TY  - JOUR
TI  - Causal Effects in Nonexperimental Studies: Reevaluating the Evaluation of Training Programs
AU  - Rajeev Dehejia
AU  - Sadek Wahba
JO  - Journal of the American Statistical Association
PY  - 1999
VL  - 94
IS  - 448
DO  - 10.1080/01621459.1999.10473858
UR  - https://doi.org/10.1080/01621459.1999.10473858
ER  -