Works
- Using the Longitudinal Structure of Earnings to Estimate the Effect of Training Programs, Review of Economics and Statistics 67(4), with David Card, 1985
In Thinking Tools
Known for
A Princeton labor economist and econometrician whose studies of job training programs compared earnings of trainees and nontrainees before and after training, an early use of the comparison now called difference in differences. With David Card he showed how sensitive such estimates are to how people come to enter a program.