Empirical Regularities across Cultures: The Effect of Children on Woman's Work
发现，在不控制先前就业时，子女对美国本土白人和新移民已婚女性劳动供给的影响差异很大；但控制前一年劳动供给后，差异缩小，子女数量与工作倾向无关，仅婴儿对先前工作的女性有影响。
Not conditioning on previous employment we find large differences in the apparent effects of children on married womens labor supply among American-born white women and three ethnically distinct groups of newly arrived immigrants to the United States. When we account for labor supply in the previous year differences in current employment rates narrow dramatically and similar child status-work relations emerge. Both for women who worked and for those who did not work in the previous year number of children is not associated with the propensity to start or to continue working and with the exception of a baby effect for women who worked previously the age of the youngest child has little effect on the propensity to start or to continue working. Information about work experience prior to the previous year yields additional valuable information for predicting current labor supply. (EXCERPT)