1. : Semiparametric difference-in-differences estimators. Rev. Econ. Stud. 72, 1–19 (2005)
2. Albers, W., Bickel, P.J., van Zwet, W.R.:
Asymptotic expansions for the power of distribution free tests in the one-sample problem. Ann. Stat. 4, 108–156 (1976)
3. Angrist, J. , Hahn, J. : When to control for covariates? Panel asymptotics for estimates of treatment effects. Rev. Econ. Stat. 86, 58–72 (2004)
4. Angrist, J.D., Krueger, A.B.:
Empirical strategies in labor economics. In: Ashenfelter, O., Card, D. (eds.) Handbook of Labor Economics, vol. 3, pp. 1277–1366. Elsevier, New York (1999)
5. Angrist, J.D., Lavy, V.:
Using Maimonides’ rule to estimate the effect of class size on scholastic achievement. Q. J. Econ. 114, 533–575 (1999)