We identify externalities in human capital production function arising from sibling spillovers. Using regression discontinuity design generated by school-entry cutoffs and school records from one district in Florida, we find positive spillover effects from an older to a younger child in less affluent families and negative spillover effects from a…

The purpose of this study was to determine whether age differences affect students' academic achievement, and whether age differences affect students in low-income areas differently than those in mixed or higher-income areas. Student achievement data for grades 3, 7, and 11 in language arts and math were obtained from a variety of schools located…

This study investigated the relationship of kindergarten entrance age to academic achievement at the end of grades one through five, and the influence of gender, race, and family income on student achievement. A total of 185 students who attended a Cooperative Demonstrative Kindergarten during 1979-82 and remained in the Starkville (Mississippi)…