TY  - JOUR
A1  - Pongou, r.
T1  - Why is infant mortality higher in boys than in girls? A new hypothesis based on preconception environment and evidence from a large sample of twins
Y1  - 2013
DO  - 10.1007/s13524-012-0161-5
JF  - Demography
VL  - 50
IS  - 2
SP  - 421
EP  - -444

ER  -