lfp
1 if wife is in the paid labor force; else 0,
k5
Number of children ages 5 and younger,
k618
Number of children ages 6 to 18,
age
Wife's age in years,
wc
1 if wife attended college; else 0,
hc
1 if husband attended college; else 0,
lwg
Log of wife's estimated wage rate,
inc
Family income excluding wife's wage,
linc
Log of Family income excluding wife's wage,