1. Angrist, J.D. (1995): “Introduction to the JBES Symposium on Program and Policy Evaluation”Journal of Business & Economic Statistics13, 133–136.
2. Angrist, J.D. and G.W. Imbens (1991): “Sources of Indentifying Information in Evaluation Models”NBER Technical Working Papers117.
3. Angrist, J.D., G.W. Imbens, and D.B. Rubin (1996): “Identification of Causal Effects Using Instrumental Variables”Journal of the American Statistical Association91, 444–472 (includes comments by J.J. Heckman, R.A. Moffitt, J.M. Robins and S. Greenland, and R.P. Rosenbaum, and a rejoinder by Angrist, Imbens, and Rubin).
4. Ashenfelter, O. (1978): “Estimating the Effect of Training Programs on Earnings”The Review of Economics and Statistics60, 47–57.
5. Ashenfelter, O. and D. Card (1985): “Using the Longitudinal Structure of Earnings to Estimate the Effect of Training Programs”The Review of Economics and Statistics67, 648–660.