Are There Increasing Returns to the Intergenerational Production of Human Capital? Maternal Schooling and Child Intellectual Achievement
利用母亲生育间隔期间继续上学的兄弟姐妹数据，检验母亲教育对子女人力资本生产是否存在递增回报，发现推迟生育两年可使子女学业测试成绩提高5%。
Information on ability and achievement test scores of sibling children, many of whom had mothers who continued their schooling between births, is used to test the hypothesis that maternal schooling augments the production of children's human capital, that there are increasing returns to human capital. Estimates from models that take into account heterogeneity in maternal endowments could not reject this hypothesis and suggest benefits to postponed childbearing. In particular, they suggest that postponement of the initiation of childbearing by two years among women who are tenth-graders would result in a 5 percent increase in their children's achievement test scores.