Table 8 reports the results of tobit estimation of Equation 13, where a woman’s
work hours from the previous year’s survey is treated as an offset term (that is, it is
entered as a regressor with a coefficient constrained to be 1). While women of all
education levels tend to cut back on hours the longer they are married, collegeeducated
women reduce their labour supply the least. Although having a husband with
less than Grade 12 is associated with the most rapidly declining labour supply after
1990, a negative relationship between hours growth and spousal education is always
found past Grade 12. In 1980, women’s hours were found to decline more slowly over
time among couples where both spouses have a college degree than among couples
where both spouses have only some college education. By 1990 this situation had
reversed and in 2000 the hours penalty associated with a college degree almost
tripled, consistent with Belkin’s (2003) argument. However, this was solely due to the
effects of husbands’ education: the marginal effect of a woman having a college