FeministX has been arguing that employment among married women increases fertility by supplementing family income. It's easy enough to test with GSS data. I limited the sample to married women ages 35 to 44, measured during any survey since 1990 (to maximize N). A husband's income should matter as well, and in the absence of a question about his income, I used one concerning the socioeconomic status of his job. Here are results for three different indicators of work: 1) full-time status versus all other statuses; 2) hours worked per week; and 3) personal annual income.
As a women is more committed to work and earns more money, she has fewer children. This is true, independent of the husband's income.
The negative coefficient for income is smaller than the others: a large income might make job and children less incompatible as it better enables one to pay for services to lighten one's domestic duties.
VARIABLES: CHILDS, FULLTIME2, SPSEI, HRS1, REALINC