1. Evaluation: A Systematic Approach;Rossi,1993
2. On the Economic Analysis of Interventions of Aged Populations in “Public Health and Aging.”;Ozminkowski,1998
3. The central role of the propensity score in observational studies for causal effects;Rosenbaum;Biometrika,1983
4. Observational Studies. Series in Statistics;Rosenbaum,2002
5. Labor supply of men;Pencavel,1986