TY  - JOUR
A1  - Heckman, J.J.
A1  - Ichimura, H.
A1  - Todd, P.
T1  - Matching as an econometric evaluation estimator
Y1  - 1998
DO  - 10.1111/1467-937X.00044
JF  - Review of Economic Studies
VL  - 65
IS  - 2
SP  - 261
EP  - -294

ER  -