TY  - JOUR
A1  - Bertrand, M.
A1  - Duflo, E.
A1  - Mullainathan, S.
T1  - How much should we trust differences-in-differences estimates?
Y1  - 2004
DO  - 10.1162/003355304772839588
VL  - 119
IS  - 1

ER  -