TY  - JOUR
A1  - Rosenzweig, M.
A1  - Wolpin, K.
T1  - Testing the quantity-quality fertility model: The use of twins as a natural experiment
Y1  - 1980
DO  - 10.2307/1912026
JF  - Econometrica
VL  - 48
IS  - 1
SP  - 227
EP  - -240

ER  -