Time-diary data from representative samples of American adults show that th
e number of overall hours of domestic labor (excluding child care and shopp
ing) has continued to decline steadily and predictably since 1965. This fin
ding is mainly due to dramatic declines among women (both in and out of the
pain labor market), who have net their housework hours almost in half sinc
e the 1960s: about half of women's 12-hour-per-week decline can be accounte
d for by compositional shifts - such as increased labor force participation
, later marriage, and fewer children. In contrast, men's housework time has
almost doubled during this period (to the point where men were responsible
for a third of housework in the 1990s), and only about 15% of their five-h
our-per-week increase can be attributed to compositional factors. Parallel
results on gender differences in housework were obtained from the National
Survey of Families and Households estimate data, even though these produce
figures 50% higher than diary data. Regression results examining factors re
lated to wives' and husbands' housework hours show more support for the tim
e-availability and relative-resource models of household production than fo
r the gender perspective, although there is some support for the latter per
spective as well.