TY  - JOUR
A1  - Rosenbaum, P. T.
A1  - Rubin, D. B.
T1  - The central role of propensity score in observational studies
Y1  - 1983
DO  - 10.1093/biomet/70.1.41
JF  - Biometrika
VL  - 70
SP  - 41
EP  - -55

ER  -