回复 水风 的帖子 N2 O( j3 v- y: g" U' ` ; r. \% F N, g* b9 X7 Y9 nData source:3 B4 t( n- K% q7 m- c
the Panel Study of Income Dynamics (PSID)5 K, k% k1 x" } R1 u0 I
the National Longitudinal Survey of Women (NLSW)3 S6 p9 J# {1 W' n" N: n
the Current Population Survey (CPS)