Birth history data from the UC Faculty Work and Family Survey provides further evidence that faculty men and faculty women have different family formation patterns. As part of the survey, we asked respondents to provide us with the month and year of up to four children entering their household and their relationship to the child, biological or otherwise. Comparing the timing and rate of birth events in relationship to assistant professor start date for all UC faculty respondents, we observe clear differences in the fertility histories of UC men and women faculty. UC faculty women are more likely to have children prior to entry into graduate school or early on in their years of graduate school. UC faculty men are considerably more likely than UC faculty women to have new babies at the critical time of career formation, from four years before to four years after assistant professor hire date. Moreover, from six years before hire date to twenty or more years after hire date, UC faculty men are more likely to have babies than are UC faculty women (this preceding section is included in Mason and Goulden 2004). Robert M. Gray, September 12, 2004
