TY  - JOUR
A1  - Angrist, J.D.
A1  - Imbens, G.W.
A1  - Rubin, D.B.
T1  - Identification of causal effects using instrumental variables
Y1  - 1996
DO  - 10.2307/2291629
JF  - Journal of the American Statistical Association
VL  - 91
IS  - 434
SP  - 444
EP  - -472

ER  -