TY  - JOUR
A1  - Heckman, J.J.
A1  - Singer, B.S.
T1  - A Method for Minimizing the Impact of Distributional Assumptions in Econometric Models for Duration Data
Y1  - 1984
DO  - 10.2307/1911491
JF  - Econometrica
VL  - 52
IS  - 2
SP  - 271
EP  - -320

ER  -