This paper examines how three dimensions of child care costs affect wo
men's labor supply: (1) women's perceptions of the price of substitute
care, (2) the amount of money that parents spend on child care, and (
3) the availability of relatives for providing care. Tobit analyses, u
sing data from the National Child Care Survey 1990, demonstrate that t
he cost of care has a multidimensional impact on women's employment. W
hat mothers think about price matters: women's perceptions of price ex
ert a negative influence on their time spent in paid work. As perceive
d minimum price increases, women's labor supply decreases. However, ac
tual price, as indicated by predicted expenditures, affects women's la
bor supply in a curvilinear fashion with low-priced and high-priced ca
re discouraging women's employment time. (C) 1995 Academic Press, Inc.