TY  - JOUR
A1  - Olsen, R.J.
A1  - Farkas, G.
T1  - Endogenous covariates in duration models and the effect of adolescent childbirth on schooling
Y1  - 1989
DO  - 10.2307/145932
JF  - Journal of Human Resources
VL  - 24
IS  - 1
SP  - 39
EP  - -53

ER  -