Shamrock organization

A small core of essential staff is surrounded by a contractual fringe of outside specialists and a flexible, part-time or temporary workforce.

What it is

A shamrock organization keeps a small core of essential staff and gets the rest of its work done two other ways: by a contractual fringe of outside specialists and firms, paid for what they deliver, and by a flexible workforce of part-time and temporary workers, engaged as the work requires. The leaves are grouped by employment relationship, not by function, product, or place. Authority sits in the small core. Commitment holds the core, contracts hold the fringe, and schedules hold the flexible workforce.

The shamrock keeps a small core and gets the rest of its work done two other ways

Select a unit or the letter to read it; the shaded field is the firm, and the contractual fringe stands outside it.

Reports toContract or priced tradeOStandardization of outputsThe firm; partners stand outside it

Select a unit or a letter to read it. O, standardization of outputs: The results of the work are specified, such as targets or product dimensions, and the method is left to the unit.Core of essential staff. Layer: The core. Reports to no one. By function. A small core of essential staff that keeps the essential functions and decides for the organization; commitment holds it (Handy 1989). Reading its grouping as function is our judgment, since the scale has no level for employment relationship.Flexible workforce. Layer: The other two leaves. Reports to Core of essential staff. Part-time and temporary workers, one leaf, engaged as the work requires and held by schedules.Contractual fringe. Layer: The other two leaves. Outside the firm. Outside specialists and firms, paid for what they deliver; the contractors manage their own delivery.O, standardization of outputs. The results of the work are specified, such as targets or product dimensions, and the method is left to the unit.

The structure in words

The core
- Core of essential staff, reports to no one, grouped by function. A small core of essential staff that keeps the essential functions and decides for the organization; commitment holds it (Handy 1989). Reading its grouping as function is our judgment, since the scale has no level for employment relationship.
The other two leaves
- Flexible workforce, reports to Core of essential staff. Part-time and temporary workers, one leaf, engaged as the work requires and held by schedules.
- Contractual fringe, outside the firm. Outside specialists and firms, paid for what they deliver; the contractors manage their own delivery.

Core of essential staff and Contractual fringe: contract or priced trade, coordinated by standardization of outputs.

A small core of essential staff holds the authority and is held by commitment. Outside specialists and firms work to contracts that specify what they deliver, and part-time and temporary workers are engaged as the work requires.

Source: Handy 1989.

Boundary permeability spans selective to permeable, and the mode of exchange spans market to clan on Handy's (1989) account, two levels that rest on theory; the second is contested: studies of the flexible firm found the split rare and unstable (Hakim 1990, two national surveys; Pollert 1988, a critical review of published evidence; Kalleberg 2001, a review; Håkansson and Isidorsson 2012, ten case studies), which places it at market to bureaucracy, itself a judgment.

The rest are our judgment. Grouping sits at function or process, since the scale has no level for employment relationship and the core keeps the essential functions. Specialization and formalization are medium; centralization is mixed, since contractors manage their own delivery; layers are flat; decision rights sit at vertical and horizontal centralization, the nearest of Mintzberg's (1980) types; the prime coordinating mechanism is standardization of outputs, set by contract; lateral mechanisms stop at hierarchy, rules, and goals; and differentiation is moderate, three very different ties joined by the core.

Where the shamrock organization sits on the eleven dimensions

The filled segments are the form's levels; select a row for its reason and sources.

Select a dimension to read why the form sits there, and on what basis.Basis of grouping: Function or process. Basis: Judgment. The form divides labor by employment relation, a split this scale does not hold; the professional core keeps the essential functions while other work goes out, so function is the nearest basis, as judgment, and critics find restructuring more uneven than that split, with outside workers sometimes on the core's advanced tasks. Sources: Handy 1989; Pollert 1988; Håkansson and Isidorsson 2012.Specialization: Medium. Basis: Judgment. A professional core with specialist work bought from a contractual fringe of outside providers; judgment for the band. Sources: Handy 1989.Standardization and formalization: Medium. Basis: Judgment. Commitment governs the core and contracts and schedules govern the fringe and the flexible workforce; judgment. Sources: Handy 1989.Centralization: Mixed. Basis: Judgment. The core decides for the organization, while contractors manage their own delivery; judgment. Sources: Handy 1989.Layers and span of control: Flat. Basis: Judgment. A small core of essential staff; judgment for the band. Sources: Handy 1989.Decision rights and the locus of authority: Vertical and horizontal centralization. Basis: Judgment. Formal and informal power sits with the core, the fringe works to contract, and the flexible workforce to schedule; nothing in Handy's account moves decisions outward, so this is judgment. Sources: Handy 1989; Mintzberg 1980.Prime coordinating mechanism: Standardization of outputs. Basis: Judgment. Much of the work outside the core is coordinated by contracts that specify what is delivered; judgment for the prime mechanism. Sources: Handy 1989.Lateral mechanisms: Hierarchy, rules, and goals only. Basis: Judgment. No designed lateral links among the three leaves appear in the source; judgment. Sources: Handy 1989.Differentiation against integration: Moderate differentiation, some integrating roles. Basis: Judgment. The three leaves differ sharply in their tie to the organization and are joined by the core; judgment. Sources: Handy 1989; Lawrence and Lorsch 1967a.Mode of exchange and control: Market and clan. Basis: Theory. Contracts for the fringe and the flexible workforce, and commitment for the core. Sources: Handy 1989; Hakim 1990; Håkansson and Isidorsson 2012; Pollert 1988; Kalleberg 2001. View 2: Market and bureaucracy. Studies of the flexible firm found the split rare and unstable: employers with a conscious core and periphery strategy were a small minority, agency workers sometimes did the same advanced work as employees, and the core and periphery concepts were called confused and circular; the core is then an ordinary employment hierarchy beside market contracts, a reading that is judgment. Sources: Hakim 1990; Håkansson and Isidorsson 2012; Pollert 1988; Kalleberg 2001.Boundary permeability: Selective to permeable. Basis: Theory. Much of the work is done by outside providers across the firm's edge. Sources: Handy 1989.

Two levels rest on theory, both on Handy's (1989) account: boundaries from selective to permeable, and a mode of exchange spanning market and clan. The other nine are judgment, grouping by function among them, since the scale has no level for employment relationship. The mode of exchange is contested: studies of the flexible firm found the split rare and unstable, which places it at market to bureaucracy, itself a judgment.

Source: Handy 1989; Pollert 1988, a critical review of published evidence; Håkansson and Isidorsson 2012, ten case studies; Mintzberg 1980, a synthesis of earlier research, offering propositions without a new test; Lawrence and Lorsch 1967a, a multi-firm comparative field study; Hakim 1990, two national surveys of workers and employers; Kalleberg 2001, a review of U.S. and British evidence.

Where it came from

Charles Handy set out the form in Understanding Voluntary Organizations (1988), where for many voluntary organizations paid staff are the core and volunteers the flexible labor force, then in The Age of Unreason (1989), in chapter 4, "The Shamrock Organization": a practitioner's argument, not a test. The first "represents the core workers, what I prefer to call the professional core." The second, the contractual fringe, is paid "for results not for time, in fees not wages." The third "is the flexible labor force, all those part-time workers" and temporary staff. He adds a fourth leaf, customers who do the work unpaid, which "cannot exist as part of the formal structure."

The schools of organization design and the forms' origins, 1900 to now

Each row is a school's era; each square under them is a form at its first year. Select a row or a square to read it; on a form's page, its own square and span are marked, with the schools that treat it.

The forms by first year

No school in the timeline lists this form among the forms it treats.

Select a school's row or a form's square to read it.Select a form's square to read it; open a school below.Bureaucracy and its critics1900s to 1950s, revived from the 1990sWhat it claimsWeber held that rational-legal authority exercised through an office hierarchy, written rules, trained officials, and promotion by qualification is technically superior in precision, speed, and reliability. Critics studied its unintended consequences, Michels's iron law sharpest.What it has shownMerton (1940) argued, with no test, that rules can turn from means into ends; case studies followed. The Aston group concluded that the type's dimensions vary independently, and Wagner's meta-analysis (2021) found that many of their interrelationships have weakened.Who disputes itHuman relations and System 4 sets the costs of impersonal rules to motivation and cooperation against the technical superiority Weber stresses.Bureaucracy and its critics in The Schools of Organization DesignClassical administration1910s to 1940s, and in German to the 1970sWhat it claimsThere are general principles of administration, among them division of work, unity of command, a scalar chain of authority, and a limited span of control, and a structure built to them will be efficient in most settings. Taylor added that planners should set work methods.What it has shownThe school offered reasoning and experience, not tests. Woodward (1965) found that the spans and levels of the more successful firms in her sample differed by production system, and Simon (1946) showed that the principles come in pairs that point in opposite directions.Who disputes itStructural contingency theory found that the structure of successful firms varies with technology and environment, where classical writers treat their principles as general.Classical administration in The Schools of Organization DesignHuman relations and System 41920s to 1960sWhat it claimsOutput depends on the social relations of work, the norms of informal groups, and the style of supervision as much as on formal design. Likert's System 4, overlapping work groups joined by linking-pin managers under participative management, outperforms authoritative systems.What it has shownThe founding evidence is the Hawthorne studies, which later reanalyses dispute (Carey 1967; Levitt and List 2011). Likert's support came largely from his own institute's surveys. Wagner (1994) found participation's effects on performance and satisfaction significant but small.Who disputes itLabor process and critical theory reads human relations as a technique of managerial control rather than a change in the distribution of power.Human relations and System 4 in The Schools of Organization DesignTransaction cost economics and the M-form hypothesis1937, then the 1970s to the presentWhat it claimsFirms exist, and are organized as they are, to economize on transaction costs. Hierarchy replaces the market when assets are specific, uncertainty is high, and exchange is frequent, and the multidivisional form should outperform the functional form in large, diversified firms.What it has shownArmour and Teece (1978) found, in United States petroleum firms from 1955 to 1973, a positive relationship between the multidivisional form and profitability while the form was spreading, but not once an equilibrium in organizational form was reached.Who disputes itThe network perspective on organizations: Granovetter argued that the theory undersocializes economic action, which is embedded in networks of personal relations that also produce trust and order.Transaction cost economics and the M-form hypothesis in The Schools of Organization DesignThe Carnegie school and the attention-based view1940s to the presentWhat it claimsPeople in organizations are boundedly rational, so structure matters because it sets the premises of their decisions and channels their attention: who sees which problems, which goals they pursue, and which routines they follow. Ocasio makes structure distribute attention.What it has shownMarch and Simon (1958) drew propositions from the existing literature, and Cyert and March (1963) added process models and simulations. Two studies show hierarchy shaping what is sent up as well as what is chosen (Reitzig and Maciejovsky 2015; Keum and See 2017).Who disputes itOrganizational economics: decision rights, authority, and complementarities models a principal and agents with defined objectives; the Carnegie school, firms as coalitions with unresolved goal conflict.The Carnegie school and the attention-based view in The Schools of Organization DesignSocio-technical systems1950s to 1980sWhat it claimsAn organization is a social system and a technical system that must be designed together. The same technology admits more than one way of organizing work, and groups that own a whole task and control its variances at the source perform better and are more satisfied.What it has shownTrist and Bamforth (1951) found that longwall mechanization broke up self-regulating work groups. A review of 134 experiments found them extremely successful overall, and Stewart (2006) linked team autonomy to performance; studies of socialist brigades and Volkswagen qualify it.Who disputes itLabor process and critical theory: Kelly argued that labor intensification, not joint optimization, accounts for what socio-technical redesign achieved, and that the part of pay incentives was seriously underestimated.Socio-technical systems in The Schools of Organization DesignThe economics of the labor-managed firm and of enterprise ownership1958 to the presentWhat it claimsA firm run by its workers behaves differently from one run for investors: Ward modeled the Yugoslav-style firm as maximizing income per worker. Hansmann argued that an ownership form's success depends on the balance between the costs of market contracting and of ownership.What it has shownBurdín (2014) found a 29 percent lower hazard of dissolution for Uruguayan worker-managed firms than for conventional ones, and Fakhfakh, Pérotin, and Gago (2012) found French labor-managed firms as productive or more so in every industry studied.Who disputes itOrganizational economics (Jensen and Meckling) contrasts the labor-managed firm, in which tradable residual claims are legally prohibited, with cooperatives and partnerships that arise out of voluntary contracting.The economics of the labor-managed firm and of enterprise ownership in The Schools of Organization DesignModularity and the mirroring hypothesis1960s to the presentWhat it claimsComplex systems are built of nearly decomposable parts, and an organization's structure tends to mirror the architecture of what it makes: modular products allow loosely coupled organizations, and tightly coupled products need tightly coupled teams. Conway's law runs in reverse.What it has shownColfer and Baldwin (2016) review the empirical studies and report both support and principled exceptions. Direct tests point both ways: MacCormack, Baldwin, and Rusnak (2012) found open source products more modular than their commercial pairs; dynamic components break the mirror.Who disputes itNo school in the record disputes it head on; it answers information processing, which meets the coordination load inside the organization; mirroring writers locate it in the product's architecture.Modularity and the mirroring hypothesis in The Schools of Organization DesignStrategy and structure1960s to 1980sWhat it claimsStructure follows strategy: firms that diversify by product or geography outgrow the centralized functional structure and, after a lag and usually a crisis, adopt divisions. Chandler drew this from the histories of DuPont, General Motors, Standard Oil of New Jersey, and Sears.What it has shownChandler (1962) is comparative business history of four firms set against a wider survey. Rumelt (1974) related diversification and structure to performance, and Egelhoff (1988), with 34 multinationals, found some of Stopford and Wells's relationships supported and others not.Who disputes itInstitutional theory: in Fligstein's model divisions spread with a product-related or unrelated strategy, presidents from sales or finance, and other firms in the industry changing; strategy was one of three.Strategy and structure in The Schools of Organization DesignStructural contingency theory1960s to the presentWhat it claimsThere is no one best structure. Performance depends on fit between structure and contingencies such as environment, technology, size, and strategy, on an open-system view of the organization. Drazin and Van de Ven separate fit as selection, interaction, and systems.What it has shownBurns and Stalker, Woodward, and the Aston group related structure to context; Drazin and Van de Ven (1985) supported selection and systems fit only. Pennings (1975) found that fit did not explain effectiveness; Schoonhoven (1981) found traditional hypotheses unsupported.Who disputes itStrategic choice: Child argued that contingency theory explains structure by the constraints of context and leaves out the political process by which power-holders choose strategic action, structural forms included.Structural contingency theory in The Schools of Organization DesignThe French bureaucratic school (strategic analysis)1960s to 1980sWhat it claimsA bureaucracy is a system of power relations organized around zones of uncertainty. Impersonal rules and centralization protect members from depending on one another, those who control uncertainties hold power, and, unable to correct its errors, it changes only through crisis.What it has shownLe phénomène bureaucratique (1963; English 1964) rests on two case studies, a clerical agency and a state industrial monopoly. L'acteur et le système (1977; English 1980) is theoretical.Who disputes itSocietal effect and comparative business systems: D'Iribarne argues that national logics of conduct, such as a French logic of honor, explain differences that Crozier attributed to power games.The French bureaucratic school (strategic analysis) in The Schools of Organization DesignThe Japanese-firm literature1960s to the presentWhat it claimsThe large Japanese firm coordinates operating decisions through horizontal information sharing among semi-autonomous shops and uses its ranking hierarchy mainly as an incentive scheme (Aoki). It creates knowledge through middle-up-down management (Nonaka and Takeuchi).What it has shownAoki (1986) is a formal model. Lincoln, Hanada, and McBride (1986) compared 51 Japanese and 55 United States manufacturing plants, and Nonaka and Takeuchi (1995) rest on case studies, chiefly of Japanese firms. Fruin (1994) found the enterprise system defined at three levels.Who disputes itLabor process and critical theory reads shop-floor delegation as control: Sewell and Wilkinson argue that just-in-time and total quality regimes delegate tactical responsibility while centralizing strategic control.The Japanese-firm literature in The Schools of Organization DesignThe Scandinavian and Dutch socio-technical schools1960s to 2000sWhat it claimsThe Scandinavian program sought democracy at work through field experiments with semi-autonomous groups, then through democratic dialogue. The Dutch school's design theory turns complex organizations with simple jobs into simple organizations with complex jobs.What it has shownEmery and Thorsrud reported field experiments in Norwegian industry; Gustavsen (1992) records that they spread less than hoped, his reason for turning to dialogue. Berggren studied work organization in the Swedish auto industry. The Dutch work rests on design cases and argument.Who disputes itThe Japanese-firm literature: defenders of the Toyota system hold that standardized work with employee participation learns faster; Berggren reports Swedish long-cycle plants matching a line plant on productivity.The Scandinavian and Dutch socio-technical schools in The Schools of Organization DesignConfiguration theory1970s to the presentWhat it claimsStructures cluster into a small number of internally coherent configurations whose elements reinforce one another, so organizations move between a few types in large jumps, not small steps. Mintzberg's five configurations each rest on one coordinating mechanism.What it has shownDoty, Glick, and Huber (1993) found that fit to Miles and Snow's ideal types predicted effectiveness while fit to Mintzberg's did not. A meta-analysis of 40 tests (Ketchen and colleagues 1997) found that configuration partly explains performance, more so with broad definitions.Who disputes itStructural contingency theory: Donaldson counters that most organizations sit at intermediate points on a continuum of fits, not in a few configurations, and that studies over time find mostly incremental change.Configuration theory in The Schools of Organization DesignInformation processing1970s to the presentWhat it claimsThe more uncertain the task, the more information must be processed during its execution. An organization either reduces that need, through slack resources or self-contained tasks, or raises its capacity, through vertical information systems or lateral relations up to the matrix.What it has shownGalbraith (1973, 1974) built the framework from cases and from Simon's theory of bounded rationality, and Tushman and Nadler (1978) set it out as an integrating concept for design. Daft and Lengel (1986) argued that structure must reduce equivocality as well as supply data.Who disputes itThe Carnegie school and the attention-based view: Ocasio holds that firm behavior results from how the firm channels and distributes attention, so structure governs where attention goes, not only how much is processed.Information processing in The Schools of Organization DesignLabor process and critical theory1970s to the presentWhat it claimsStructure is above all a system of control over labor. Braverman argued that management deskills work by separating conception from execution; Edwards traced a sequence from simple control by the boss to technical control through machines to bureaucratic control through rules.What it has shownHistorical and theoretical (Braverman 1974; Edwards 1979). Delbridge (1995), observing a Japanese-owned plant in England, found that just-in-time and total quality regimes combined the control of labor with management's economic goals more completely than piece rates had.Who disputes itBureaucracy and its critics: Adler argues that labor process theory ignores the progressive socialization of the labor process, which drives long-term skill upgrading, and disputes deskilling as the trend.Labor process and critical theory in The Schools of Organization DesignStrategic choice1970s to the presentWhat it claimsStructure is the outcome of choices by those with power in the organization, who decide on strategic action, including the structural form, the manipulation of environmental features, and the performance standards to be met. Context constrains but does not determine structure.What it has shownLargely conceptual: Child (1972) built the argument from gaps in contingency findings, and the empirical case rests mostly on the modest share of structural variance contingencies explain. A 2026 review of 42 studies finds upper echelons theory their main theoretical anchor.Who disputes itStructural contingency theory: Donaldson replies that organizations mostly adopt the structures their contingencies dictate, to avoid the loss of performance misfit brings, so choice over structure is at most limited.Strategic choice in The Schools of Organization DesignThe German codetermination literature1970s to the presentWhat it claimsWorks councils and employee board seats form a structural layer through which coordination can become negotiation between management and employees. Defenders argue that it supports long-term employment, training, and cooperation; critics, that it weakens shareholder control.What it has shownJäger, Schoefer, and Heining (2021) found board-level codetermination left wages unchanged and, if anything, raised capital formation. Jirjahn (2011) reports studies pointing to positive works council effects; a meta-analysis found codetermination laws tied to lower productivity.Who disputes itOrganizational economics (Gorton and Schmid) found that firms with equal employee and shareholder representation did worse for their shareholders than firms with one-third employee representation.The German codetermination literature in The Schools of Organization DesignOrganizational economics: decision rights, authority, and complementarities1976 to the presentWhat it claimsDesign is the joint choice of who holds which decision rights, how performance is measured, and how it is rewarded. Rights should be placed where the specific knowledge lies, formal authority differs from real authority, and practices are complements that pay off in clusters.What it has shownIchniowski, Shaw, and Prennushi (1997) found, on 36 steel finishing lines, that lines using a set of innovative work practices achieved substantially higher productivity, consistent with complementarities. Bloom and colleagues found more decentralization where trust was higher.Who disputes itGhoshal argued that management research has shaped managers' worldview with ideologically inspired amoral theories, built on a scientific model that excludes human intentionality and so denies moral considerations.Organizational economics: decision rights, authority, and complementarities in The Schools of Organization DesignInstitutional theory1977 to the presentWhat it claimsFormal structures are often adopted because they are legitimate in the organization's field, as rationalized myths, and then decoupled from the work done. Organizations in a field grow alike through coercive, mimetic, and normative isomorphism, whether or not it is efficient.What it has shownTolbert and Zucker (1983) found that city characteristics predicted early but not later adoption of civil service reform, which they read as institutionalization. Palmer, Jennings, and Zhou (1993) found support for institutional and economic accounts of late M-form adoption.Who disputes itStructural contingency theory: Kraatz and Zajac found little support for neoinstitutional predictions in 631 liberal arts colleges, which grew less alike; the change they studied was curricular, not structural.Institutional theory in The Schools of Organization DesignPopulation ecology1977 to the presentWhat it claimsOrganizations face strong structural inertia, because selection favors the reliability and accountability of stable structures. Change in a population's forms comes mainly from founding and failure, not adaptation, and changing core features resets the liability of newness.What it has shownAmburgey, Kelly, and Barnett (1993) found that the effects of change on the hazard of failure vary by type of change and over time, and that rates of change depend on how often and how recently an organization has changed. Carroll and Hannan (2000) set out the program's methods.Who disputes itFor structural contingency theory, Donaldson argues that ecology understates managers' capacity to adapt structure.Population ecology in The Schools of Organization DesignResource dependence1978 to the presentWhat it claimsOrganizations depend on outside parties for critical resources, and structure follows the management of that dependence: units that cope with critical dependencies gain power, and boundaries are redrawn through cooptation, joint ventures, and mergers to absorb constraint.What it has shownPfeffer and Salancik (1978) assembled studies of boards, mergers, and joint ventures. A meta-analysis of 157 tests (Drees and Heugens 2013) corroborated the main prediction: organizations meet resource dependencies with interorganizational arrangements that raise their autonomy.Who disputes itTransaction cost economics and the M-form hypothesis explains boundaries by efficiency; resource dependence, by power and constraint.Resource dependence in The Schools of Organization DesignThe business-groups literature1978 to the presentWhat it claimsGroups of legally independent firms bound by ownership and social ties are a durable form of their own, neither one firm nor a market. Where institutions function poorly, groups can benefit member firms and can destroy value; they are sometimes paragons, sometimes parasites.What it has shownKhanna and Palepu (2000) found that affiliates of the most diversified Indian groups outperformed unaffiliated firms. A meta-analysis of 141 studies (Carney and colleagues 2011) found that affiliation lowers performance in general, less so where institutions are underdeveloped.Who disputes itOrganizational economics: agency writers read pyramids and cross-holdings as devices that separate control from ownership; Almeida and Wolfenzon offer a financing rationale for pyramids instead.The business-groups literature in The Schools of Organization DesignScandinavian institutionalism1980s to the presentWhat it claimsIdeas of organizing do not diffuse unchanged; they travel and are translated as they are adopted, so a form taken up in one place is not the same form elsewhere. Organizations can also be built of organizations (meta-organizations), which behave differently.What it has shownA discussion paper by Czarniawska and Joerges (1995) contrasts the diffusion of ideas with their translation, drawing on examples such as Swedish municipal reform; the work on meta-organizations (Ahrne and Brunsson 2008) is conceptual.Who disputes itInstitutional theory can read the same processes, seen from a translocal view, as institutional isomorphism, though translation holds that each adopter modifies an idea, so an institution re-created elsewhere is new.Scandinavian institutionalism in The Schools of Organization DesignSocietal effect and comparative business systems1980s to the presentWhat it claimsFirms matched on size, technology, and industry differ systematically by country, because how a society educates, trains, recruits, and promotes its workforce, and its industrial relations, shape how work is divided and supervised, so structure is partly a national product.What it has shownMaurice, Sorge, and Warner (1980) compared closely matched manufacturing units in France, West Germany, and Great Britain and found more pervasive differences in their organization than usually recognized. Whitley (1999) set out a comparative account of business systems.Who disputes itStructural contingency theory stresses culture-free elements of structure; matched comparisons find nationally different shapes of organization.Societal effect and comparative business systems in The Schools of Organization DesignThe network perspective on organizations1985 to the presentWhat it claimsOrganizations and their members are nodes joined by ties, and the pattern of ties shapes what they can do. Economic action is embedded in networks of personal relations (Granovetter 1985), and network forms are a distinct form, not a hybrid of market and hierarchy (Powell 1990).What it has shownPodolny and Page (1998) review the research and find that network forms foster learning, confer status and legitimacy, bring economic benefits, help manage resource dependencies, and give employees considerable autonomy, and they ask for attention to networks' dysfunctions.Who disputes itTransaction cost economics: Williamson treats the hybrid as a third generic form between market and hierarchy; for Powell, network forms are a distinct form, not a mix of the two.The network perspective on organizations in The Schools of Organization DesignComputational organization design and search1990s to the presentWhat it claimsDesign choices interact, so design space is a rugged landscape with many local peaks, and structure affects how well an organization searches it. Decentralizing interdependent decisions can trap units on poor peaks; temporary decentralization, then reintegration, can help.What it has shownMostly simulation, with one field test: Csaszar (2012), with more than 150,000 stock-picking decisions by 609 mutual funds, found that decision-making structure affects the number of initiatives pursued and the omission and commission errors made.Who disputes itNo school in the record disputes it head on; it disputes structural contingency theory, whose bivariate fit, its simulations show, cannot capture how the best design depends on interactions among choices.Computational organization design and search in The Schools of Organization DesignThe new-forms debate1990s to the presentWhat it claimsOrganizations must solve four universal problems (dividing tasks, allocating them, providing rewards, and providing information), and a form is new when it solves them in new ways. Self-managing organizations radically decentralize authority; skeptics hold hierarchy reappears.What it has shownFoss (2003) traced the rise and partial reversal of Oticon's spaghetti organization to the problem of selective intervention. A meta-analysis of 54 studies of 13,914 teams (Greer and colleagues 2018) found that hierarchy within teams on net slightly lowers team performance.Who disputes itBureaucracy and its critics: removing formal structure leaves informal elites whose power is unaccountable (Freeman), and democratic and network organizations are much less hierarchy-free than their labels suggest.The new-forms debate in The Schools of Organization DesignThe algorithmic-management literature2015 to the presentWhat it claimsSoftware does much of the directing, evaluating, and disciplining that managers and rules once did. Kellogg, Valentine, and Christin (2020) call algorithmic control a new contested terrain; Puranam (2021) treats dividing decisions between people and machines as a design problem.What it has shownMostly qualitative field studies of gig work. Wood and colleagues (2019), with 107 interviews in six countries and 679 survey respondents, found that algorithmic management tends to give remote gig workers flexibility and autonomy, but also low pay, isolation, and overwork.Who disputes itLabor process and critical theory reads control at work as contested terrain; Kellogg, Valentine, and Christin take up that view but argue that algorithmic control is distinct from earlier forms.The algorithmic-management literature in The Schools of Organization DesignFunctional structureOrigin: 1911 to 1937.Family: Classical hierarchies.Line and staffOrigin: 1916 to 1943.Family: Classical hierarchies.Multidivisional (M-form) by productOrigin: 1920s practice; named and analyzed 1962 to 1975.Family: Divisionalized forms.Machine bureaucracyOrigin: 1922 (Weber); 1979 (Mintzberg).Family: Classical hierarchies.Divisional by customer or market segmentOrigin: 1937; 2005.Family: Divisionalized forms.Matrix organizationOrigin: 1950s to 1960s practice; analyzed 1971 to 1977.Family: Lateral and multidimensional forms.Co-determined organizationOrigin: 1951 to 1976 (the laws); 1984 to 2022 (the main studies).Family: Forms from other traditions.Socio-technical autonomous work groupsOrigin: 1951 to 1965.Family: Team-based and self-managing forms.Stratified hierarchy (requisite organization)Origin: 1951 to 1989.Family: Classical hierarchies.Cooperative organizationOrigin: 1958 to 1999.Family: Forms from other traditions.Linking-pin organization (System 4)Origin: 1961 to 1967.Family: Team-based and self-managing forms.Divisional by regionOrigin: 1962 to 1972.Family: Divisionalized forms.Adhocracy (innovative organization)Origin: 1968 to 1979.Family: Professional, project, and knowledge forms.J-form (the Japanese firm)Origin: 1968 to 1990.Family: Forms from other traditions.Professional bureaucracyOrigin: 1968 to 1979.Family: Professional, project, and knowledge forms.Holding company (H-form)Origin: 1972 to 1975; 1987.Family: Divisionalized forms.Ambidextrous organizationOrigin: 1976 to 2004.Family: Professional, project, and knowledge forms.Simple structureOrigin: 1979.Family: Classical hierarchies.Hybrid structureOrigin: 1980 to the present.Family: Lateral and multidimensional forms.Missionary (ideological) organizationOrigin: 1980 to 1989.Family: Ideological forms.Network, modular, and virtual organizationOrigin: 1986 to 1990.Family: Network and market-like forms.Transnational and multidimensional organizationOrigin: 1987 to 1989.Family: Lateral and multidimensional forms.Business group (keiretsu, chaebol, family house)Origin: 1988 to 2007.Family: Forms from other traditions.Shamrock organizationOrigin: 1988 to 1989.Family: Network and market-like forms.Federal organizationOrigin: 1989 to 1992.Family: Network and market-like forms.Self-managing organization (less-hierarchical forms)Origin: 1989 to 2017.Family: Team-based and self-managing forms.Boundaryless organizationOrigin: 1990 to 1995.Family: Network and market-like forms.Front-back organizationOrigin: 1990s to 2007.Family: Lateral and multidimensional forms.Professional partnership (P2 form)Origin: 1990.Family: Professional, project, and knowledge forms.The corporate center and shared servicesOrigin: 1991 to 2000.Family: Divisionalized forms.Internal market organizationOrigin: 1993 to 1994.Family: Network and market-like forms.Process (horizontal) organizationOrigin: 1993 to 1999.Family: Lateral and multidimensional forms.Cellular organizationOrigin: 1994 to 1997.Family: Network and market-like forms.Hypertext organizationOrigin: 1994 to 1995.Family: Forms from other traditions.Team-based organizationOrigin: 1995.Family: Team-based and self-managing forms.Project-based organizationOrigin: 2000 to 2006.Family: Professional, project, and knowledge forms.Agile at scaleOrigin: 2001 to 2016.Family: Contemporary and emerging forms.Distributed (all-remote) organizationOrigin: 2002 to 2021.Family: Contemporary and emerging forms.Open-source and community-based organizationOrigin: 2002 to 2007.Family: Contemporary and emerging forms.Algorithmically managed organizationOrigin: 2015 to 2020.Family: Contemporary and emerging forms.Team of teamsOrigin: 2015.Family: Team-based and self-managing forms.

The schools by first year

Bureaucracy and its critics1900s to 1950s, revived from the 1990sWhat it claimsWeber held that rational-legal authority exercised through an office hierarchy, written rules, trained officials, and promotion by qualification is technically superior in precision, speed, and reliability. Critics studied its unintended consequences, Michels's iron law sharpest.What it has shownMerton (1940) argued, with no test, that rules can turn from means into ends; case studies followed. The Aston group concluded that the type's dimensions vary independently, and Wagner's meta-analysis (2021) found that many of their interrelationships have weakened.Who disputes itHuman relations and System 4 sets the costs of impersonal rules to motivation and cooperation against the technical superiority Weber stresses.
Classical administration1910s to 1940s, and in German to the 1970sWhat it claimsThere are general principles of administration, among them division of work, unity of command, a scalar chain of authority, and a limited span of control, and a structure built to them will be efficient in most settings. Taylor added that planners should set work methods.What it has shownThe school offered reasoning and experience, not tests. Woodward (1965) found that the spans and levels of the more successful firms in her sample differed by production system, and Simon (1946) showed that the principles come in pairs that point in opposite directions.Who disputes itStructural contingency theory found that the structure of successful firms varies with technology and environment, where classical writers treat their principles as general.
Human relations and System 41920s to 1960sWhat it claimsOutput depends on the social relations of work, the norms of informal groups, and the style of supervision as much as on formal design. Likert's System 4, overlapping work groups joined by linking-pin managers under participative management, outperforms authoritative systems.What it has shownThe founding evidence is the Hawthorne studies, which later reanalyses dispute (Carey 1967; Levitt and List 2011). Likert's support came largely from his own institute's surveys. Wagner (1994) found participation's effects on performance and satisfaction significant but small.Who disputes itLabor process and critical theory reads human relations as a technique of managerial control rather than a change in the distribution of power.
Transaction cost economics and the M-form hypothesis1937, then the 1970s to the presentWhat it claimsFirms exist, and are organized as they are, to economize on transaction costs. Hierarchy replaces the market when assets are specific, uncertainty is high, and exchange is frequent, and the multidivisional form should outperform the functional form in large, diversified firms.What it has shownArmour and Teece (1978) found, in United States petroleum firms from 1955 to 1973, a positive relationship between the multidivisional form and profitability while the form was spreading, but not once an equilibrium in organizational form was reached.Who disputes itThe network perspective on organizations: Granovetter argued that the theory undersocializes economic action, which is embedded in networks of personal relations that also produce trust and order.
The Carnegie school and the attention-based view1940s to the presentWhat it claimsPeople in organizations are boundedly rational, so structure matters because it sets the premises of their decisions and channels their attention: who sees which problems, which goals they pursue, and which routines they follow. Ocasio makes structure distribute attention.What it has shownMarch and Simon (1958) drew propositions from the existing literature, and Cyert and March (1963) added process models and simulations. Two studies show hierarchy shaping what is sent up as well as what is chosen (Reitzig and Maciejovsky 2015; Keum and See 2017).Who disputes itOrganizational economics: decision rights, authority, and complementarities models a principal and agents with defined objectives; the Carnegie school, firms as coalitions with unresolved goal conflict.
Socio-technical systems1950s to 1980sWhat it claimsAn organization is a social system and a technical system that must be designed together. The same technology admits more than one way of organizing work, and groups that own a whole task and control its variances at the source perform better and are more satisfied.What it has shownTrist and Bamforth (1951) found that longwall mechanization broke up self-regulating work groups. A review of 134 experiments found them extremely successful overall, and Stewart (2006) linked team autonomy to performance; studies of socialist brigades and Volkswagen qualify it.Who disputes itLabor process and critical theory: Kelly argued that labor intensification, not joint optimization, accounts for what socio-technical redesign achieved, and that the part of pay incentives was seriously underestimated.
The economics of the labor-managed firm and of enterprise ownership1958 to the presentWhat it claimsA firm run by its workers behaves differently from one run for investors: Ward modeled the Yugoslav-style firm as maximizing income per worker. Hansmann argued that an ownership form's success depends on the balance between the costs of market contracting and of ownership.What it has shownBurdín (2014) found a 29 percent lower hazard of dissolution for Uruguayan worker-managed firms than for conventional ones, and Fakhfakh, Pérotin, and Gago (2012) found French labor-managed firms as productive or more so in every industry studied.Who disputes itOrganizational economics (Jensen and Meckling) contrasts the labor-managed firm, in which tradable residual claims are legally prohibited, with cooperatives and partnerships that arise out of voluntary contracting.
Modularity and the mirroring hypothesis1960s to the presentWhat it claimsComplex systems are built of nearly decomposable parts, and an organization's structure tends to mirror the architecture of what it makes: modular products allow loosely coupled organizations, and tightly coupled products need tightly coupled teams. Conway's law runs in reverse.What it has shownColfer and Baldwin (2016) review the empirical studies and report both support and principled exceptions. Direct tests point both ways: MacCormack, Baldwin, and Rusnak (2012) found open source products more modular than their commercial pairs; dynamic components break the mirror.Who disputes itNo school in the record disputes it head on; it answers information processing, which meets the coordination load inside the organization; mirroring writers locate it in the product's architecture.
Strategy and structure1960s to 1980sWhat it claimsStructure follows strategy: firms that diversify by product or geography outgrow the centralized functional structure and, after a lag and usually a crisis, adopt divisions. Chandler drew this from the histories of DuPont, General Motors, Standard Oil of New Jersey, and Sears.What it has shownChandler (1962) is comparative business history of four firms set against a wider survey. Rumelt (1974) related diversification and structure to performance, and Egelhoff (1988), with 34 multinationals, found some of Stopford and Wells's relationships supported and others not.Who disputes itInstitutional theory: in Fligstein's model divisions spread with a product-related or unrelated strategy, presidents from sales or finance, and other firms in the industry changing; strategy was one of three.
Structural contingency theory1960s to the presentWhat it claimsThere is no one best structure. Performance depends on fit between structure and contingencies such as environment, technology, size, and strategy, on an open-system view of the organization. Drazin and Van de Ven separate fit as selection, interaction, and systems.What it has shownBurns and Stalker, Woodward, and the Aston group related structure to context; Drazin and Van de Ven (1985) supported selection and systems fit only. Pennings (1975) found that fit did not explain effectiveness; Schoonhoven (1981) found traditional hypotheses unsupported.Who disputes itStrategic choice: Child argued that contingency theory explains structure by the constraints of context and leaves out the political process by which power-holders choose strategic action, structural forms included.
The French bureaucratic school (strategic analysis)1960s to 1980sWhat it claimsA bureaucracy is a system of power relations organized around zones of uncertainty. Impersonal rules and centralization protect members from depending on one another, those who control uncertainties hold power, and, unable to correct its errors, it changes only through crisis.What it has shownLe phénomène bureaucratique (1963; English 1964) rests on two case studies, a clerical agency and a state industrial monopoly. L'acteur et le système (1977; English 1980) is theoretical.Who disputes itSocietal effect and comparative business systems: D'Iribarne argues that national logics of conduct, such as a French logic of honor, explain differences that Crozier attributed to power games.
The Japanese-firm literature1960s to the presentWhat it claimsThe large Japanese firm coordinates operating decisions through horizontal information sharing among semi-autonomous shops and uses its ranking hierarchy mainly as an incentive scheme (Aoki). It creates knowledge through middle-up-down management (Nonaka and Takeuchi).What it has shownAoki (1986) is a formal model. Lincoln, Hanada, and McBride (1986) compared 51 Japanese and 55 United States manufacturing plants, and Nonaka and Takeuchi (1995) rest on case studies, chiefly of Japanese firms. Fruin (1994) found the enterprise system defined at three levels.Who disputes itLabor process and critical theory reads shop-floor delegation as control: Sewell and Wilkinson argue that just-in-time and total quality regimes delegate tactical responsibility while centralizing strategic control.
The Scandinavian and Dutch socio-technical schools1960s to 2000sWhat it claimsThe Scandinavian program sought democracy at work through field experiments with semi-autonomous groups, then through democratic dialogue. The Dutch school's design theory turns complex organizations with simple jobs into simple organizations with complex jobs.What it has shownEmery and Thorsrud reported field experiments in Norwegian industry; Gustavsen (1992) records that they spread less than hoped, his reason for turning to dialogue. Berggren studied work organization in the Swedish auto industry. The Dutch work rests on design cases and argument.Who disputes itThe Japanese-firm literature: defenders of the Toyota system hold that standardized work with employee participation learns faster; Berggren reports Swedish long-cycle plants matching a line plant on productivity.
Configuration theory1970s to the presentWhat it claimsStructures cluster into a small number of internally coherent configurations whose elements reinforce one another, so organizations move between a few types in large jumps, not small steps. Mintzberg's five configurations each rest on one coordinating mechanism.What it has shownDoty, Glick, and Huber (1993) found that fit to Miles and Snow's ideal types predicted effectiveness while fit to Mintzberg's did not. A meta-analysis of 40 tests (Ketchen and colleagues 1997) found that configuration partly explains performance, more so with broad definitions.Who disputes itStructural contingency theory: Donaldson counters that most organizations sit at intermediate points on a continuum of fits, not in a few configurations, and that studies over time find mostly incremental change.
Information processing1970s to the presentWhat it claimsThe more uncertain the task, the more information must be processed during its execution. An organization either reduces that need, through slack resources or self-contained tasks, or raises its capacity, through vertical information systems or lateral relations up to the matrix.What it has shownGalbraith (1973, 1974) built the framework from cases and from Simon's theory of bounded rationality, and Tushman and Nadler (1978) set it out as an integrating concept for design. Daft and Lengel (1986) argued that structure must reduce equivocality as well as supply data.Who disputes itThe Carnegie school and the attention-based view: Ocasio holds that firm behavior results from how the firm channels and distributes attention, so structure governs where attention goes, not only how much is processed.
Labor process and critical theory1970s to the presentWhat it claimsStructure is above all a system of control over labor. Braverman argued that management deskills work by separating conception from execution; Edwards traced a sequence from simple control by the boss to technical control through machines to bureaucratic control through rules.What it has shownHistorical and theoretical (Braverman 1974; Edwards 1979). Delbridge (1995), observing a Japanese-owned plant in England, found that just-in-time and total quality regimes combined the control of labor with management's economic goals more completely than piece rates had.Who disputes itBureaucracy and its critics: Adler argues that labor process theory ignores the progressive socialization of the labor process, which drives long-term skill upgrading, and disputes deskilling as the trend.
Strategic choice1970s to the presentWhat it claimsStructure is the outcome of choices by those with power in the organization, who decide on strategic action, including the structural form, the manipulation of environmental features, and the performance standards to be met. Context constrains but does not determine structure.What it has shownLargely conceptual: Child (1972) built the argument from gaps in contingency findings, and the empirical case rests mostly on the modest share of structural variance contingencies explain. A 2026 review of 42 studies finds upper echelons theory their main theoretical anchor.Who disputes itStructural contingency theory: Donaldson replies that organizations mostly adopt the structures their contingencies dictate, to avoid the loss of performance misfit brings, so choice over structure is at most limited.
The German codetermination literature1970s to the presentWhat it claimsWorks councils and employee board seats form a structural layer through which coordination can become negotiation between management and employees. Defenders argue that it supports long-term employment, training, and cooperation; critics, that it weakens shareholder control.What it has shownJäger, Schoefer, and Heining (2021) found board-level codetermination left wages unchanged and, if anything, raised capital formation. Jirjahn (2011) reports studies pointing to positive works council effects; a meta-analysis found codetermination laws tied to lower productivity.Who disputes itOrganizational economics (Gorton and Schmid) found that firms with equal employee and shareholder representation did worse for their shareholders than firms with one-third employee representation.
Organizational economics: decision rights, authority, and complementarities1976 to the presentWhat it claimsDesign is the joint choice of who holds which decision rights, how performance is measured, and how it is rewarded. Rights should be placed where the specific knowledge lies, formal authority differs from real authority, and practices are complements that pay off in clusters.What it has shownIchniowski, Shaw, and Prennushi (1997) found, on 36 steel finishing lines, that lines using a set of innovative work practices achieved substantially higher productivity, consistent with complementarities. Bloom and colleagues found more decentralization where trust was higher.Who disputes itGhoshal argued that management research has shaped managers' worldview with ideologically inspired amoral theories, built on a scientific model that excludes human intentionality and so denies moral considerations.
Institutional theory1977 to the presentWhat it claimsFormal structures are often adopted because they are legitimate in the organization's field, as rationalized myths, and then decoupled from the work done. Organizations in a field grow alike through coercive, mimetic, and normative isomorphism, whether or not it is efficient.What it has shownTolbert and Zucker (1983) found that city characteristics predicted early but not later adoption of civil service reform, which they read as institutionalization. Palmer, Jennings, and Zhou (1993) found support for institutional and economic accounts of late M-form adoption.Who disputes itStructural contingency theory: Kraatz and Zajac found little support for neoinstitutional predictions in 631 liberal arts colleges, which grew less alike; the change they studied was curricular, not structural.
Population ecology1977 to the presentWhat it claimsOrganizations face strong structural inertia, because selection favors the reliability and accountability of stable structures. Change in a population's forms comes mainly from founding and failure, not adaptation, and changing core features resets the liability of newness.What it has shownAmburgey, Kelly, and Barnett (1993) found that the effects of change on the hazard of failure vary by type of change and over time, and that rates of change depend on how often and how recently an organization has changed. Carroll and Hannan (2000) set out the program's methods.Who disputes itFor structural contingency theory, Donaldson argues that ecology understates managers' capacity to adapt structure.
Resource dependence1978 to the presentWhat it claimsOrganizations depend on outside parties for critical resources, and structure follows the management of that dependence: units that cope with critical dependencies gain power, and boundaries are redrawn through cooptation, joint ventures, and mergers to absorb constraint.What it has shownPfeffer and Salancik (1978) assembled studies of boards, mergers, and joint ventures. A meta-analysis of 157 tests (Drees and Heugens 2013) corroborated the main prediction: organizations meet resource dependencies with interorganizational arrangements that raise their autonomy.Who disputes itTransaction cost economics and the M-form hypothesis explains boundaries by efficiency; resource dependence, by power and constraint.
The business-groups literature1978 to the presentWhat it claimsGroups of legally independent firms bound by ownership and social ties are a durable form of their own, neither one firm nor a market. Where institutions function poorly, groups can benefit member firms and can destroy value; they are sometimes paragons, sometimes parasites.What it has shownKhanna and Palepu (2000) found that affiliates of the most diversified Indian groups outperformed unaffiliated firms. A meta-analysis of 141 studies (Carney and colleagues 2011) found that affiliation lowers performance in general, less so where institutions are underdeveloped.Who disputes itOrganizational economics: agency writers read pyramids and cross-holdings as devices that separate control from ownership; Almeida and Wolfenzon offer a financing rationale for pyramids instead.
Scandinavian institutionalism1980s to the presentWhat it claimsIdeas of organizing do not diffuse unchanged; they travel and are translated as they are adopted, so a form taken up in one place is not the same form elsewhere. Organizations can also be built of organizations (meta-organizations), which behave differently.What it has shownA discussion paper by Czarniawska and Joerges (1995) contrasts the diffusion of ideas with their translation, drawing on examples such as Swedish municipal reform; the work on meta-organizations (Ahrne and Brunsson 2008) is conceptual.Who disputes itInstitutional theory can read the same processes, seen from a translocal view, as institutional isomorphism, though translation holds that each adopter modifies an idea, so an institution re-created elsewhere is new.
Societal effect and comparative business systems1980s to the presentWhat it claimsFirms matched on size, technology, and industry differ systematically by country, because how a society educates, trains, recruits, and promotes its workforce, and its industrial relations, shape how work is divided and supervised, so structure is partly a national product.What it has shownMaurice, Sorge, and Warner (1980) compared closely matched manufacturing units in France, West Germany, and Great Britain and found more pervasive differences in their organization than usually recognized. Whitley (1999) set out a comparative account of business systems.Who disputes itStructural contingency theory stresses culture-free elements of structure; matched comparisons find nationally different shapes of organization.
The network perspective on organizations1985 to the presentWhat it claimsOrganizations and their members are nodes joined by ties, and the pattern of ties shapes what they can do. Economic action is embedded in networks of personal relations (Granovetter 1985), and network forms are a distinct form, not a hybrid of market and hierarchy (Powell 1990).What it has shownPodolny and Page (1998) review the research and find that network forms foster learning, confer status and legitimacy, bring economic benefits, help manage resource dependencies, and give employees considerable autonomy, and they ask for attention to networks' dysfunctions.Who disputes itTransaction cost economics: Williamson treats the hybrid as a third generic form between market and hierarchy; for Powell, network forms are a distinct form, not a mix of the two.
Computational organization design and search1990s to the presentWhat it claimsDesign choices interact, so design space is a rugged landscape with many local peaks, and structure affects how well an organization searches it. Decentralizing interdependent decisions can trap units on poor peaks; temporary decentralization, then reintegration, can help.What it has shownMostly simulation, with one field test: Csaszar (2012), with more than 150,000 stock-picking decisions by 609 mutual funds, found that decision-making structure affects the number of initiatives pursued and the omission and commission errors made.Who disputes itNo school in the record disputes it head on; it disputes structural contingency theory, whose bivariate fit, its simulations show, cannot capture how the best design depends on interactions among choices.
The new-forms debate1990s to the presentWhat it claimsOrganizations must solve four universal problems (dividing tasks, allocating them, providing rewards, and providing information), and a form is new when it solves them in new ways. Self-managing organizations radically decentralize authority; skeptics hold hierarchy reappears.What it has shownFoss (2003) traced the rise and partial reversal of Oticon's spaghetti organization to the problem of selective intervention. A meta-analysis of 54 studies of 13,914 teams (Greer and colleagues 2018) found that hierarchy within teams on net slightly lowers team performance.Who disputes itBureaucracy and its critics: removing formal structure leaves informal elites whose power is unaccountable (Freeman), and democratic and network organizations are much less hierarchy-free than their labels suggest.
The algorithmic-management literature2015 to the presentWhat it claimsSoftware does much of the directing, evaluating, and disciplining that managers and rules once did. Kellogg, Valentine, and Christin (2020) call algorithmic control a new contested terrain; Puranam (2021) treats dividing decisions between people and machines as a design problem.What it has shownMostly qualitative field studies of gig work. Wood and colleagues (2019), with 107 interviews in six countries and 679 survey respondents, found that algorithmic management tends to give remote gig workers flexibility and autonomy, but also low pay, isolation, and overwork.Who disputes itLabor process and critical theory reads control at work as contested terrain; Kellogg, Valentine, and Christin take up that view but argue that algorithmic control is distinct from earlier forms.

The forms by first year

Functional structure: 1911 to 1937
Line and staff: 1916 to 1943
Multidivisional (M-form) by product: 1920s practice; named and analyzed 1962 to 1975
Machine bureaucracy: 1922 (Weber); 1979 (Mintzberg)
Divisional by customer or market segment: 1937; 2005
Matrix organization: 1950s to 1960s practice; analyzed 1971 to 1977
Co-determined organization: 1951 to 1976 (the laws); 1984 to 2022 (the main studies)
Socio-technical autonomous work groups: 1951 to 1965
Stratified hierarchy (requisite organization): 1951 to 1989
Cooperative organization: 1958 to 1999
Linking-pin organization (System 4): 1961 to 1967
Divisional by region: 1962 to 1972
Adhocracy (innovative organization): 1968 to 1979
J-form (the Japanese firm): 1968 to 1990
Professional bureaucracy: 1968 to 1979
Holding company (H-form): 1972 to 1975; 1987
Ambidextrous organization: 1976 to 2004
Simple structure: 1979
Hybrid structure: 1980 to the present
Missionary (ideological) organization: 1980 to 1989
Network, modular, and virtual organization: 1986 to 1990
Transnational and multidimensional organization: 1987 to 1989
Business group (keiretsu, chaebol, family house): 1988 to 2007
Shamrock organization: 1988 to 1989
Federal organization: 1989 to 1992
Self-managing organization (less-hierarchical forms): 1989 to 2017
Boundaryless organization: 1990 to 1995
Front-back organization: 1990s to 2007
Professional partnership (P2 form): 1990
The corporate center and shared services: 1991 to 2000
Internal market organization: 1993 to 1994
Process (horizontal) organization: 1993 to 1999
Cellular organization: 1994 to 1997
Hypertext organization: 1994 to 1995
Team-based organization: 1995
Project-based organization: 2000 to 2006
Agile at scale: 2001 to 2016
Distributed (all-remote) organization: 2002 to 2021
Open-source and community-based organization: 2002 to 2007
Algorithmically managed organization: 2015 to 2020
Team of teams: 2015

Twenty-three of the 29 schools run to the present, and 16 of those began in the 1970s or later. The forms arrive in waves: 14 of the 41 first appear between 1985 and 1994.

Source: Fayol 1949; Weber 1978; Mayo 1933; Trist and Bamforth 1951, an interview-based field study in one industry; Burns and Stalker 1961, a field study of twenty firms; Mintzberg 1979; Child 1972a; Coase 1937; Meyer and Rowan 1977; Hannan and Freeman 1977; Galbraith 1973; Jensen and Meckling 1976; Crozier 1963; Emery and Thorsrud 1969; Yoshino 1968; Streeck 1984a; Kellogg and colleagues 2020, a review of earlier research through one theoretical lens, with no new data; Puranam and colleagues 2014, a conceptual argument; Chandler 1962, several independent case histories by a historian; Pfeffer and Salancik 1978; Simon 1946; Maurice and colleagues 1980, a comparison of matched factories in three countries; Levinthal 1997; Simon 1962; Braverman 1974; Hamilton and Biggart 1988, a comparison of three economies by scholars; Ward 1958; Czarniawska and Joerges 1995; Granovetter 1985.

It answered how to keep the knowledge an organization needs while holding labor costs flexible, as work is outsourced and jobs become less permanent.

No sector of origin is recorded. A close relative, "Atkinson's model of the flexible firm," in Hakim's (1990) words, ran through the 1980s debate on labor market flexibility, and most of the evidence below tests the core and periphery split the two share.

Where it fits

Knowledge intensity rests on theory, Handy's argument; the other eleven cells are our judgment. Three are contested.

The shamrock organization against the twelve contingency factors

Each factor at its three levels, Fits, Partial, or Strain; select a row for its reason, sources, and grade.

Select a factor to read its reason, sources, basis, and grade.Size. Larger establishments use more independent contractors but fewer temporary workers, so only one of the outer leaves grows with size. Basis: Judgment. Sources: Davis-Blake and Uzzi 1993; Handy 1989.Age. Age shapes how far firms can use flexible employment, but the direction is not known, so no age is marked as a fit. Basis: Judgment. Sources: Uzzi and Barsness 1998.Environmental uncertainty (unpredictability, dynamism). Where the demand for labor varies, firms make more use of temporary workers and contractors; with steady demand the flexible leaves have less to do. Basis: Judgment. Sources: Davis-Blake and Uzzi 1993; Handy 1989; Hakim 1990; Pollert 1988; Pennings 1975. View 1: Stable partial, Shifting fits, Unpredictable fits. Where the demand for labor varies, establishments make more use of temporary workers and contractors, the outer leaves. Sources: Davis-Blake and Uzzi 1993; Handy 1989. View 2: Stable partial, Shifting partial, Unpredictable partial. Employers with a conscious core and periphery strategy are a small minority and do not employ disproportionately many peripheral workers, and the flexible firm model rests on selective cases. Sources: Hakim 1990; Pollert 1988.Environmental complexity. How the workforce is split into core, contractors, and flexible labor answers cost and variability, not the number of factors in the environment. Basis: Judgment. Sources: Handy 1989; Davis-Blake and Uzzi 1993.Munificence and hostility. Works disagree: on Handy's argument a contractual fringe lets the firm cut cost without touching its core, while a review of the evidence found the core and periphery model resting on very selective cases. Basis: Judgment. Sources: Handy 1989; Davis-Blake and Uzzi 1993; Pollert 1988; Pennings 1975. View 1: Hostile fits, Neutral partial, Munificent partial. A contractual fringe and a flexible workforce let the firm cut cost without touching its core when resources shrink. Sources: Handy 1989. View 2: Hostile partial, Neutral partial, Munificent partial. The core and periphery model rests on very selective cases, and restructuring follows more complex and uneven lines than a protected core and a disposable fringe. Sources: Pollert 1988.Diversity of products and markets. How the workforce is split into core, contractors, and flexible labor does not depend on the business mix. Basis: Judgment. Sources: Handy 1989.Strategy type. Dividing labor by employment terms lets a defender cut cost through a flexible workforce and a prospector buy new expertise from contractors; no work read ties the form to a strategy type. Basis: Judgment. Sources: Handy 1989; Lepak and Snell 2002.Technology and routineness. Agency workers were found on simple tasks in some firms and on the same advanced tasks as employees in others, so routineness does not settle where the leaves fall. Basis: Judgment. Sources: Håkansson and Isidorsson 2012; Handy 1989.Interdependence. The leaves split people by contract, not by workflow, so pooled and sequential work can sit on either side; work that must be adjusted back and forth with short-contract outsiders lacks the ties tight coupling needs. Basis: Judgment. Sources: Handy 1989; Colfer and Baldwin 2016; Thompson 1967.Knowledge intensity and professionalization. The shamrock separates a trained core from contractors and a flexible workforce, which suits a mix of specialists and less specialized roles; where most work needs high skill, firms use fewer temporary workers, and where little does, the core shrinks and work can be degraded for everyone. Basis: Theory. Grade: conceptual only, no empirical test. Sources: Handy 1989; Davis-Blake and Uzzi 1993; Lepak and Snell 2002; Håkansson and Isidorsson 2012; Pollert 1988; Hakim 1990; Kalleberg 2001. View 1: Low partial, Moderate fits, High partial. The shamrock separates a trained core from contractors and a flexible workforce, which suits a mix of specialists and less specialized roles; where skill requirements are high, firms used fewer temporary workers, and where work is organized around low-skilled agency workers, it was degraded for everyone. Sources: Handy 1989; Davis-Blake and Uzzi 1993; Lepak and Snell 2002; Håkansson and Isidorsson 2012. View 2: Low partial, Moderate partial, High partial. Whether firms run a deliberate core and periphery split is itself disputed: the model rests on selective cases, employers with a conscious core and periphery strategy were a small minority, and the model is incomplete in important ways. Sources: Pollert 1988; Hakim 1990; Kalleberg 2001.Global integration pressure. No work read ties the shamrock to integration pressure across countries, so this factor gives no reason for or against. Basis: Judgment. Sources: Handy 1989.Local responsiveness pressure. No work read ties the shamrock to local responsiveness across countries, so this factor gives no reason for or against. Basis: Judgment. Sources: Handy 1989.

Counting each contested cell by its first view, the 36 settings read Fits at 5, Partial at 30, and Strain at 1, the one strain reciprocal interdependence. Three of the twelve cells are contested, and eleven rest on judgment.

Source: Davis-Blake and Uzzi 1993, a survey of a large sample of U.S. employers; Handy 1989; Uzzi and Barsness 1998, a representative survey of British establishments; Hakim 1990, two national surveys of workers and employers; Pollert 1988, a critical review of published evidence; Pennings 1975, a quantitative field test of the structural-contingency model; Lepak and Snell 2002, a study of 148 firms; Håkansson and Isidorsson 2012, ten case studies; Colfer and Baldwin 2016, a review of 142 empirical studies; Thompson 1967; Kalleberg 2001, a review of U.S. and British evidence.

Your own situation against the shamrock organization

Set any factor to outline its cell in the strip above; the lines under the switches give the counts, the form's place among the 41, and the misfit rules that fire.

Size

Age

Environmental uncertainty (unpredictability, dynamism)

Environmental complexity

Munificence and hostility

Diversity of products and markets

Strategy type

Technology and routineness

Interdependence

Knowledge intensity and professionalization

Global integration pressure

Local responsiveness pressure

Set: 0 of 12 factors. Fits on 0, Partial on 0, Strain on 0, Contested on 0.

Its place in the explorer's rankingEvery factor is on Any: all 41 forms tie, and the explorer lists them alphabetically.1st of 411st of 41, tied with one other1st of 41, tied with 0 othersSunk by a misfit rule: 1st of 41Sunk by a misfit rule: 1st of 41, tied with one otherSunk by a misfit rule: 1st of 41, tied with 0 others

Sinks the form: Differentiated departments joined only by the hierarchy. Source: Lawrence and Lorsch 1967a; Galbraith 1974.
Flagged (its sources disagree): The hierarchy alone carries an unpredictable environment. Disputed: Galbraith 1974; Galbraith 1973; against it, Burton and Obel 2004; Mintzberg 1980.
Flagged (its sources disagree): The hierarchy alone carries nonroutine work. Disputed: Galbraith 1974; Galbraith 1973; against it, Schoonhoven 1981.
Sinks the form: The hierarchy alone carries reciprocal work. Source: Galbraith 1973; Galbraith 1974; Thompson 1967.

Ranking rule: by count of Fits on the factors the reader has set, then fewest Strains, then alphabetical; a fired misfit rule that no source disputes sinks the form to the bottom when every level of the form's profile meets it, a disputed one, or one that meets the form only through one end of a spanned level, one view of a contested profile cell, or one part of a two-part form, is flagged on the row (with both views where it is disputed), and a misfit between two of the reader's own settings is shown once above the list; a contested cell counts only where its views agree at the reader's level, and otherwise shows as Contested; factors on "Any" count for nothing; with every factor on "Any" the list is alphabetical and says so.

Open these settings in the explorer

The misfit rules that can fire for this form

Differentiated departments joined only by the hierarchy fires when Environmental complexity at Complex: sinks the form. Source: Lawrence and Lorsch 1967a; Galbraith 1974.
The hierarchy alone carries an unpredictable environment fires when Environmental uncertainty (unpredictability, dynamism) at Unpredictable: flagged (its sources disagree). Disputed: Galbraith 1974; Galbraith 1973; against it, Burton and Obel 2004; Mintzberg 1980.
The hierarchy alone carries nonroutine work fires when Technology and routineness at Nonroutine: flagged (its sources disagree). Disputed: Galbraith 1974; Galbraith 1973; against it, Schoonhoven 1981.
The hierarchy alone carries reciprocal work fires when Interdependence at Reciprocal: sinks the form. Source: Galbraith 1973; Galbraith 1974; Thompson 1967.

Of the 39 contingency misfit rules, four can fire for this form: two would sink it and two would only flag it.

Source: Burton and Obel 2004; Burton and colleagues 2020a.

Size. Our judgment: partial small, fits medium, partial large. Davis-Blake and Uzzi (1993), a survey of 2,752 U.S. establishments, found larger establishments using more contractors but fewer temporary workers.
Age. Our judgment: partial throughout. Uzzi and Barsness (1998), a representative survey of British establishments, found contingent use shaped by size and age, direction not given in the abstract.
Environmental uncertainty. Our judgment, contested. One view (Davis-Blake and Uzzi 1993; Handy 1989): partial stable, fits shifting and unpredictable, since varying employment needs, a near proxy for this factor, raised the use of both outer leaves. The other: partial throughout, since employers with a conscious core and periphery strategy were a small minority (Hakim 1990) and the model rests on selective cases (Pollert 1988). A limit here and on munificence: Pennings (1975), a quantitative field test of the structural-contingency model, found environment and structure fit did not explain effectiveness, a null Donaldson (2001) lays to method.
Environmental complexity. Our judgment: partial throughout; the split answers cost and variability.
Munificence and hostility. Our judgment, contested. On Handy's argument the outer leaves let the firm cut cost without touching its core: fits hostile, partial otherwise. On Pollert's review: partial throughout.
Diversity. Our judgment: partial throughout.
Strategy. Our judgment: partial throughout; a defender can cut cost through flexible labor, a prospector buy expertise from contractors (premises: Handy 1989; Lepak and Snell 2002).
Technology. Our judgment: partial throughout. Håkansson and Isidorsson (2012) found agency workers on simple tasks in some workplaces and on advanced ones in others.
Interdependence. Our judgment: partial pooled and sequential, strain reciprocal, since the leaves split people by contract, not workflow, and tightly coupled work tends to stay inside one organization unless relational contracts carry it (premises: Thompson 1967; Colfer and Baldwin 2016, a review of 142 empirical studies).
Knowledge intensity. Theory, contested. View one: partial low, fits moderate, partial high. The fit rests on Handy's (1989) argument for a trained core beside the outer leaves; no study tests the middle level. Premises for the partials: Håkansson and Isidorsson's (2012) ten Swedish case studies found work built around low-skilled agency workers degraded for all, high skill needs cut the use of temporary workers, skill being untested for contractors (Davis-Blake and Uzzi 1993), and human capital differed across employment modes (Lepak and Snell 2002, a study of 148 firms). View two: partial throughout, since a deliberate split is itself disputed (Pollert 1988; Hakim 1990; Kalleberg 2001).
Global integration and local responsiveness. Our judgment: partial throughout.

What it does well

It protects the core while costs move: on Handy's (1989) argument, the people who carry the knowledge stay and the outer leaves take the swings. Pollert (1988) counters that restructuring is more uneven than a protected core and a disposable fringe.

The outer leaves absorb variation. Davis-Blake and Uzzi (1993) found that variation in employment needs increased the use of both temporary workers and independent contractors, though they measured externalized workers, not the three-leaf form, and Hakim (1990) found deliberate strategies rare.

Seven drivers of the two outer leaves, sorted by their effect on temporary workers and on contractors

The effect on the use of temporary workers runs across and the effect on the use of independent contractors runs up, each as Davis-Blake and Uzzi report it; select a driver, then the box it belongs in, or show the sort. "Not tested" means the study had no contractor measure for that driver (training and skill were measured only for temporary workers' jobs); "No effect found" means it tested the driver and found none. The study counted externalized workers, not the three-leaf form.

Items (select one, then a box)

Not placedPlacedBoth riseOpposite waysTemporary workers onlyContractors not testedContractors onlyNo driver here
Not placedPlacedBoth riseOpposite waysTemporary workers onlyContractors not testedContractors onlyNo driver here
Not placedPlacedBoth riseOpposite waysTemporary workers onlyContractors not testedContractors onlyNo driver here
Not placedPlacedBoth riseOpposite waysTemporary workers onlyContractors not testedContractors onlyNo driver here
Not placedPlacedBoth riseOpposite waysTemporary workers onlyContractors not testedContractors onlyNo driver here
Not placedPlacedBoth riseOpposite waysTemporary workers onlyContractors not testedContractors onlyNo driver here
Not placedPlacedBoth riseOpposite waysTemporary workers onlyContractors not testedContractors onlyNo driver here

Effect on independent contractors

MoreNo effect foundNot tested

Opposite ways

Contractors only

Both rise

Temporary workers only

No driver here

Contractors not tested

FewerNo effect foundMore

Effect on temporary workers

Both rise: The driver increased the use of both temporary workers and independent contractors.Opposite ways: The driver reduced the use of temporary workers and increased the use of independent contractors.Temporary workers only: The driver reduced the use of temporary workers and had no effect on the use of independent contractors.Contractors not tested: The driver reduced the use of temporary workers; it was measured only for temporary workers' jobs, so the study has no test of it for contractors.Contractors only: The driver increased the use of independent contractors and had no effect on the use of temporary workers.No driver here: None of the seven drivers lands here: none raised the use of temporary workers without also raising the use of contractors, and each had an effect on at least one kind of worker.Select an item, then the box it belongs in.Firm-specific training.Not placed yet.Firm-specific training.Both rise: The driver increased the use of both temporary workers and independent contractors.Firm-specific training.Opposite ways: The driver reduced the use of temporary workers and increased the use of independent contractors.Firm-specific training.Temporary workers only: The driver reduced the use of temporary workers and had no effect on the use of independent contractors.Firm-specific training.Contractors not tested: The driver reduced the use of temporary workers; it was measured only for temporary workers' jobs, so the study has no test of it for contractors.Firm-specific training reduced the use of temporary workers; it was measured only for temporary workers' jobs, so contractors were not tested.Firm-specific training.Contractors only: The driver increased the use of independent contractors and had no effect on the use of temporary workers.Firm-specific training.No driver here: None of the seven drivers lands here: none raised the use of temporary workers without also raising the use of contractors, and each had an effect on at least one kind of worker.Government oversight.Not placed yet.Government oversight.Both rise: The driver increased the use of both temporary workers and independent contractors.Government oversight.Opposite ways: The driver reduced the use of temporary workers and increased the use of independent contractors.Government oversight.Temporary workers only: The driver reduced the use of temporary workers and had no effect on the use of independent contractors.Government oversight reduced the use of temporary workers and had no effect on the use of independent contractors.Government oversight.Contractors not tested: The driver reduced the use of temporary workers; it was measured only for temporary workers' jobs, so the study has no test of it for contractors.Government oversight.Contractors only: The driver increased the use of independent contractors and had no effect on the use of temporary workers.Government oversight.No driver here: None of the seven drivers lands here: none raised the use of temporary workers without also raising the use of contractors, and each had an effect on at least one kind of worker.High skill requirements.Not placed yet.High skill requirements.Both rise: The driver increased the use of both temporary workers and independent contractors.High skill requirements.Opposite ways: The driver reduced the use of temporary workers and increased the use of independent contractors.High skill requirements.Temporary workers only: The driver reduced the use of temporary workers and had no effect on the use of independent contractors.High skill requirements.Contractors not tested: The driver reduced the use of temporary workers; it was measured only for temporary workers' jobs, so the study has no test of it for contractors.High informational or technical skill requirements reduced the use of temporary workers; skill was measured only for temporary workers' jobs, so contractors were not tested.High skill requirements.Contractors only: The driver increased the use of independent contractors and had no effect on the use of temporary workers.High skill requirements.No driver here: None of the seven drivers lands here: none raised the use of temporary workers without also raising the use of contractors, and each had an effect on at least one kind of worker.Bureaucratized practices.Not placed yet.Bureaucratized practices.Both rise: The driver increased the use of both temporary workers and independent contractors.Bureaucratized practices.Opposite ways: The driver reduced the use of temporary workers and increased the use of independent contractors.Bureaucratized employment practices reduced the use of temporary workers and increased the use of independent contractors.Bureaucratized practices.Temporary workers only: The driver reduced the use of temporary workers and had no effect on the use of independent contractors.Bureaucratized practices.Contractors not tested: The driver reduced the use of temporary workers; it was measured only for temporary workers' jobs, so the study has no test of it for contractors.Bureaucratized practices.Contractors only: The driver increased the use of independent contractors and had no effect on the use of temporary workers.Bureaucratized practices.No driver here: None of the seven drivers lands here: none raised the use of temporary workers without also raising the use of contractors, and each had an effect on at least one kind of worker.Establishment size.Not placed yet.Establishment size.Both rise: The driver increased the use of both temporary workers and independent contractors.Establishment size.Opposite ways: The driver reduced the use of temporary workers and increased the use of independent contractors.Larger establishments used fewer temporary workers and more independent contractors.Establishment size.Temporary workers only: The driver reduced the use of temporary workers and had no effect on the use of independent contractors.Establishment size.Contractors not tested: The driver reduced the use of temporary workers; it was measured only for temporary workers' jobs, so the study has no test of it for contractors.Establishment size.Contractors only: The driver increased the use of independent contractors and had no effect on the use of temporary workers.Establishment size.No driver here: None of the seven drivers lands here: none raised the use of temporary workers without also raising the use of contractors, and each had an effect on at least one kind of worker.Varying employment needs.Not placed yet.Varying employment needs.Both rise: The driver increased the use of both temporary workers and independent contractors.Variation in employment needs increased the use of both temporary workers and independent contractors.Varying employment needs.Opposite ways: The driver reduced the use of temporary workers and increased the use of independent contractors.Varying employment needs.Temporary workers only: The driver reduced the use of temporary workers and had no effect on the use of independent contractors.Varying employment needs.Contractors not tested: The driver reduced the use of temporary workers; it was measured only for temporary workers' jobs, so the study has no test of it for contractors.Varying employment needs.Contractors only: The driver increased the use of independent contractors and had no effect on the use of temporary workers.Varying employment needs.No driver here: None of the seven drivers lands here: none raised the use of temporary workers without also raising the use of contractors, and each had an effect on at least one kind of worker.Multiple-site firm.Not placed yet.Multiple-site firm.Both rise: The driver increased the use of both temporary workers and independent contractors.Multiple-site firm.Opposite ways: The driver reduced the use of temporary workers and increased the use of independent contractors.Multiple-site firm.Temporary workers only: The driver reduced the use of temporary workers and had no effect on the use of independent contractors.Multiple-site firm.Contractors not tested: The driver reduced the use of temporary workers; it was measured only for temporary workers' jobs, so the study has no test of it for contractors.Multiple-site firm.Contractors only: The driver increased the use of independent contractors and had no effect on the use of temporary workers.Being part of a multiple-site firm increased the use of independent contractors and had no effect on the use of temporary workers.Multiple-site firm.No driver here: None of the seven drivers lands here: none raised the use of temporary workers without also raising the use of contractors, and each had an effect on at least one kind of worker.

Your sort matched 0 of 7.Your sort matched 1 of 7.Your sort matched 2 of 7.Your sort matched 3 of 7.Your sort matched 4 of 7.Your sort matched 5 of 7.Your sort matched 6 of 7.Your sort matched 7 of 7.

Both rise: The driver increased the use of both temporary workers and independent contractors.
Opposite ways: The driver reduced the use of temporary workers and increased the use of independent contractors.
Temporary workers only: The driver reduced the use of temporary workers and had no effect on the use of independent contractors.
Contractors not tested: The driver reduced the use of temporary workers; it was measured only for temporary workers' jobs, so the study has no test of it for contractors.
Contractors only: The driver increased the use of independent contractors and had no effect on the use of temporary workers.
No driver here: None of the seven drivers lands here: none raised the use of temporary workers without also raising the use of contractors, and each had an effect on at least one kind of worker.

The sort

Firm-specific training: Contractors not tested. Firm-specific training reduced the use of temporary workers; it was measured only for temporary workers' jobs, so contractors were not tested.
Government oversight: Temporary workers only. Government oversight reduced the use of temporary workers and had no effect on the use of independent contractors.
High skill requirements: Contractors not tested. High informational or technical skill requirements reduced the use of temporary workers; skill was measured only for temporary workers' jobs, so contractors were not tested.
Bureaucratized practices: Opposite ways. Bureaucratized employment practices reduced the use of temporary workers and increased the use of independent contractors.
Establishment size: Opposite ways. Larger establishments used fewer temporary workers and more independent contractors.
Varying employment needs: Both rise. Variation in employment needs increased the use of both temporary workers and independent contractors.
Multiple-site firm: Contractors only. Being part of a multiple-site firm increased the use of independent contractors and had no effect on the use of temporary workers.

The two outer leaves have different drivers. Establishment size and bureaucratized practices push them opposite ways, fewer temporary workers and more contractors, and only varying employment needs raises both.

Source: Davis-Blake and Uzzi 1993, a survey of a large sample of U.S. employers.

Some flexibility raises productivity. Hirsch and Mueller (2012), a panel study of German firms, found a robust hump-shaped effect of temporary agency work on the user firm's productivity, and Pfeifer and Weche (2019), a firm-level replication study that does not say whether its data are new, supported the concave link. De Stefano, Bonet, and Camuffo (2019), monthly data from one company's units, found planned turnover of temporary workers related to performance in an inverted U.

It can match the terms to the work: Lepak and Snell (2002), a cross-sectional study, found human capital of different value and uniqueness across four employment modes. Two records cut against it: in Maeura's (2015) case studies of Japanese companies, head office payroll, not each job's skills, set the mix, and some of Håkansson and Isidorsson's workplaces put agency workers on employees' advanced tasks.

The fringe need not be discontented: Wilkin (2013), a meta-analysis of 72 studies, found contractors about as satisfied as permanent employees.

What it costs

"Logic, however, does not necessarily imply ease," Handy writes, "and these are not easy organizations."

Standard staff can pay for working beside outsiders. Davis-Blake, Broschak, and George (2003), a study of standard employees (sample not confirmed), found that blending worsened relations with managers, decreased loyalty, and raised interest in leaving and in unionizing, effects that depended on whether the outsiders were temporary or contract, among other conditions. Broschak and Davis-Blake (2006), a study of work groups (sample not confirmed), found more nonstandard workers associated with members' poorer attitudes toward supervisors and peers, higher turnover intentions, and less helping, depending on the type of arrangement and the contact between the groups, among other conditions.

The agency leaf is less satisfied: Wilkin (2013) found agency workers below permanent employees, and contingent workers overall at d = -0.21, a small gap (d = -0.06) once outlying studies were removed.

Past a point, flexibility costs productivity. Hirsch and Mueller's curve turns down; they expected losses from temporary workers' lower firm-specific human capital and from spillovers onto permanent staff.

How it fails

How the shamrock organization fails, and the coordination failures behind it

The entry's failure modes at the left, each tied to the Coordination Failures patterns it names at the right; a pattern links its entry there.

Commons under-provision Tacit-knowledge evaporation Goal displacement and metric gaming Jurisdictional gap or overlap Regulator overload Dropped commitment

How many ties the failure has. Highest: Mixed work groups stop helping; standard staff look for the doorKnowledge walks out with the flexible leafThe periphery swallows the coreThe flexible leaf is managed informallyReciprocal work is pushed across the contract lineCommons under-provisionTacit-knowledge evaporationGoal displacement and metric gamingJurisdictional gap or overlapRegulator overloadDropped commitment

Select a failure to read its place in the network.Mixed work groups stop helping; standard staff look for the door. Degree 1Knowledge walks out with the flexible leaf. Degree 1The periphery swallows the core. Degree 1The flexible leaf is managed informally. Degree 1Reciprocal work is pushed across the contract line. Degree 2Commons under-provision. Degree 1Tacit-knowledge evaporation. Degree 1Goal displacement and metric gaming. Degree 1Jurisdictional gap or overlap. Degree 1Regulator overload. Degree 1Dropped commitment. Degree 1

Failure	Degree
Mixed work groups stop helping; standard staff look for the door	1
Knowledge walks out with the flexible leaf	1
The periphery swallows the core	1
The flexible leaf is managed informally	1
Reciprocal work is pushed across the contract line	2
Commons under-provision	1
Tacit-knowledge evaporation	1
Goal displacement and metric gaming	1
Jurisdictional gap or overlap	1
Regulator overload	1
Dropped commitment	1

Five failure modes name six patterns, and only reciprocal work pushed across the contract line names two: regulator overload and dropped commitment. No study shows that mode; it rests on our judgment of the interdependence strain.

Source: Broschak and Davis-Blake 2006, a study of work groups (sample not confirmed); Davis-Blake and colleagues 2003, a study of standard employees (sample not confirmed); De Stefano and colleagues 2019, monthly data from the units of one company; Håkansson and Isidorsson 2012, ten case studies; Ryan and colleagues 2017, one case study (one university); Thompson 1967; Colfer and Baldwin 2016, a review of 142 empirical studies; Galbraith 1973; Galbraith 1974.

Mixed work groups stop helping, and standard staff look for the door. Our reading: commons under-provision. Broschak and Davis-Blake (2006) found less helping where nonstandard workers were a larger share; Davis-Blake, Broschak, and George (2003) found lower loyalty and more interest in leaving and in unionizing. Both varied with the arrangement.

Knowledge walks out with the flexible leaf. Our reading: tacit-knowledge evaporation. De Stefano, Bonet, and Camuffo (2019), one company, found the disruption costs of planned turnover moderated by the replacements' share and firm-specific experience.

The periphery swallows the core. Our reading: goal displacement. Håkansson and Isidorsson (2012) found an All Periphery pattern in which work built around low-skilled, easily replaced agency workers was deskilled and degraded for all. Ryan, Connell, and Burgess (2017), one case study of a university, conclude that, given growing reliance on casual academics, their management threatens the future of tenured academics and the idea of a university.

The flexible leaf is managed informally. Our reading: jurisdictional gap. At that university the line management of casual academics was informally delegated to subject coordinators.

Reciprocal work is pushed across the contract line. Our reading: regulator overload and dropped commitment. No study shows it; the interdependence strain is our judgment.

Because grouping is read as function and lateral mechanisms stop at hierarchy, both our judgment, four misfit rules fire. Two, untested propositions no source disputes, meet every level the profile records on their dimensions (for the first, moderate differentiation too), so each sinks the form: differentiated units joined only by the hierarchy in a complex environment (Lawrence and Lorsch 1967), which cuts against the complexity cell (partial throughout), and reciprocal work routed through the common boss (Galbraith 1973, 1974; Thompson 1967). Two are contested and flagged: the hierarchy alone facing an unpredictable environment (Galbraith; disputed for simple environments by Mintzberg 1980 and by Burton and Obel 2004, the most developed scholarly fit model), which cuts against the uncertainty cell's first view, and the hierarchy alone carrying nonroutine work (Galbraith; disputed by Schoonhoven 1981, a quantitative study of hospital operating room suites), which cuts against the technology cell's premise that routineness does not settle where the leaves fall. Each pairs one factor with one structure, the interaction form of fit that Drazin and Van de Ven (1985), a quantitative study of 629 work units in two states' employment security agencies, found unsupported.

What the research found

The first dispute is whether the split exists as a design. Pollert (1988) argued that the model rests on very selective cases and that its concepts are confused, circular, and value laden. Hakim (1990), two national surveys of British workers and employers in 1987, found the core and periphery balance changing mainly through traditional and opportunistic use, and employers with a conscious strategy a small minority. Kalleberg (2001), a review of U.S. and British evidence, found the model incomplete in important ways, though Kalleberg (2003), an argument without data, holds that U.S. employers' flexibility strategies divide insiders in standard employment from outsiders in nonstandard arrangements, with consequences that depend on workers' control over skills. Deery and Jago (2002), a survey of 287 employees in seven hotels, questioned clearly defined workforce groups in hotels. Håkansson and Isidorsson (2012) found the split one outcome among three.

Cappelli and Keller (2013), a conceptual classification, offer a finer vocabulary than three leaves. On consequences, Wilkin's meta-analysis (N = 237,856) is the strongest evidence here and measures satisfaction, not firm performance; the studies by De Stefano and colleagues, by Gamble and Huang, and by Ryan, Connell, and Burgess each rest on one organization.

The performance line has a replication. Nielen and Schiersch (2014), a panel study of German manufacturing firms, report an inverse U between agency work and competitiveness measured by unit labor costs. Pfeifer and Weche (2019), replicating them and Hirsch and Mueller, supported the concave link with productivity but found a convex relationship with unit labor costs, not a U, and only a moderate correlation with profitability; whether their data are new is not stated.

On record, the most recent studies date from 2019. No school in this explorer lists the form. By our reading the labor-process school, for which structure is a system of control over labor, bears on it: Kern and Schumann (1987), the authors' summary of their West German research, found rationalization at a turning point toward professionalized work in the main industrial sectors, with the rigid exclusion of other parts of the workforce, a forecast they returned to (Kern and Schumann 1992). Their split runs between sectors and parts of the labor force, not one firm's employment tiers.

The evidence ledger holds 20 studies filed under this form.

In practice: one published case

No case of one named organization run as a shamrock or flexible firm was located in searches of Crossref, industrial relations journals, business-school case collections, and the web, so this is the nearest published single case: one case study, an ethnography, which qualifies the model more than it illustrates it.

The organization is, as the source names it, a store of a multinational retail firm in China; the firm is not named. Jos Gamble and Qihai Huang published the study in 2009.

The store ran two employment systems side by side: its own regular employees and vendor representatives, workers placed in the store by its suppliers.

In practice, the two groups stood in a four-sided relationship, among the store, the suppliers, and the two groups of workers, in which their interests sometimes overlapped but often competed.

Gamble and Huang conclude from this store that the core and periphery model, derived mainly from manufacturing in Western settings, is insufficient to capture these employment arrangements, and that China's institutional arrangements shape the strategies open to the firm and the resulting structure of employment.

It is one store in one country: it shows what happened there and what its authors concluded, nothing more.

Source: Gamble and Huang 2009. One store, two employment systems: core, periphery and flexibility in China's retail sector, British Journal of Industrial Relations 47(1), 1 to 26; one case study.

Variants and near relatives

The flexible firm (core and periphery), Atkinson's model, around which Hakim (1990) reports the debate is structured, segments workers between a permanent core of full-time employees, who give functional flexibility, and a periphery of part-time, temporary, subcontract, and outsourced workers, who give numerical flexibility. It has two leaves where Handy has three.

The employment portfolio (Nikkeiren's three groups, Japan) is the Japanese employers' version. Nikkeiren's 1995 report, Japanese Management for a New Era, divides human resources, by JIL's 2002 overview, into those who accumulate abilities over a long period, those with highly specialized skills, and those who can be employed flexibly, and recommends limiting long-term employment to the first, narrowing the long-term employment core of the J-form (the Japanese firm). Umezaki and Yashiro (2019), a historical study of one employers' federation's policy, find a two-category stock and flow portfolio already set out in the federation's policy in the late 1980s, so the new move was the third, a professional group of short-term employees, whose growth was not confirmed by the early 2000s; critics tie the report to labor cost cuts and unstable employment after the bubble economy collapsed. Unlike Handy's fringe, these specialists are the firm's own short-term employees.

The network, modular, and virtual organization, the nearest neighbor, divides the activities among firms. Closest is its modular organization, which Schilling and Steensma (2001, an industry-level study whose results could not be read) carry across firm lines into contract manufacturing, alternative work arrangements, and alliances: it splits the work itself, whereas the shamrock sorts the people who do it by their terms of engagement.

The shamrock beside its nearest neighbor, the network

Select a number to fill what it marks in both drawings; the list under them gives the dimensions on which the two profiles differ.

It divides the workforce by employment relationship (a committed core, contracted outside specialists, and a flexible part-time and temporary workforce), each engaged on its own terms, whereas the network form divides the activities themselves among firms.

Shamrock organization

Reports toContract or priced tradeOStandardization of outputsThe firm; partners stand outside it

Network, modular, and virtual organization

Contract or priced tradeAdjust to each other directlyMMutual adjustmentOStandardization of outputsThe firm; partners stand outside it

The shamrock's leaves are kinds of employment, a contractual fringe and a flexible workforce beside the core; the network's partners are firms, one for each step of the value chain.
Authority sits in the shamrock's small core, which heads the flexible workforce; the network's hub or broker heads no partner, and each partner decides over its own link.
Standardized outputs alone coordinate the shamrock's fringe, through contracts that specify what is delivered; the network has its partners adjust to one another directly as well.

Differs on 7 of 11 dimensions

Specialization Medium; Network, modular, and virtual organization: High
Centralization Mixed; Network, modular, and virtual organization: Decentralized
Decision rights and the locus of authority Vertical and horizontal centralization; Network, modular, and virtual organization: Limited vertical decentralization to selective vertical and horizontal decentralization
Prime coordinating mechanism Standardization of outputs; Network, modular, and virtual organization: Mutual adjustment and standardization of outputs
Lateral mechanisms Hierarchy, rules, and goals only; Network, modular, and virtual organization: Direct contact and liaison roles
Mode of exchange and control Market and clan; Network, modular, and virtual organization: Market
Boundary permeability Selective to permeable; Network, modular, and virtual organization: Permeable

Both forms keep a small core and hold outside parties by contract. The shamrock sorts the people who do its work by their terms of engagement, and the network splits the work itself among firms.

Source: Handy 1989; Miles and Snow 1986; Powell 1990.

Moving into or out of it

In Britain in 1987, few employers had moved into the form by design: Hakim (1990) found the balance changing mainly through traditional and opportunistic use of peripheral workers, while the minority with a conscious strategy reorganized work more thoroughly, with more subcontractors, self-employed, and agency workers.

Amburgey, Kelly, and Barnett (1993), a quantitative study of organizational change and failure rates, found that the effect of change on failure varies by the type of change and over time. For this form, no record gives the order of the move, and no study read measures what moving in or out costs. The running of a reorganization belongs to Change & Transformation.

The thinking behind it

Charles Handy (1989): the shamrock organization, a prescriptive argument, not a test.

The flexible-firm research, which explains why the split is contested as a design: Anna Pollert (1988), a critique; Catherine Hakim (1990), Arne Kalleberg (2001, 2003), Kristina Håkansson (2012), Margaret Deery (2002), and Peter Cappelli (2013). Horst Kern (1987, with Michael Schumann): new concepts of production, a forecast they returned to in 1992; by our reading, the labor-process view nearest the split.

The studies that explain each leaf's drivers and costs: Alison Davis-Blake (1993, 2003), Joseph Broschak (2006), David Lepak (2002), Christa Wilkin (2013), Federica De Stefano (2019), Boris Hirsch (2012), Sebastian Nielen (2014), Christian Pfeifer (2019), Jos Gamble (2009), Osamu Umezaki (2019), and Hodaka Maeura (2015).

The theory the profile and the rules use: Henry Mintzberg (1980), a synthesis, not a test: configurations, whose coordinating mechanisms and decentralization types the profile uses. James Thompson (1967), propositions tested later by others: interdependence, the premise of the reciprocal strain. Carliss Baldwin (2016, with Lyra Colfer), a review: mirroring, why coupled work tends to stay inside one organization. Paul Lawrence and Jay Lorsch (1967), a field study of ten firms: differentiation and integration, and Jay Galbraith (1974), information processing built from cases and theory: the misfit rules that fire here. Claudia Bird Schoonhoven (1981), problems with contingency theory, and Richard Burton and Børge Obel (2004), a multi-contingency fit model synthesized from the literature: the disputes its rules carry. Robert Drazin (1985, with Andrew Van de Ven): three forms of fit, which limit what a one-factor rule shows. Terry Amburgey (1993): change and failure, whose link varies by type of change and over time.

Also called

Three-leaf organization; core-periphery organization. The sources say the flexible firm or the core and periphery model (Pollert 1988; Hakim 1990).

Works cited

Ahrne and Brunsson 2008. Meta-organizations, Edward Elgar, Cheltenham.
Amburgey and colleagues 1993. Resetting the clock: the dynamics of organizational change and failure, Administrative Science Quarterly 38(1), from p. 51; a quantitative study of organizational change and failure rates.
Aoki 1986. Horizontal vs. vertical information structure of the firm, American Economic Review 76(5), 971 to 983; a formal economic model.
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