Large numbers of children of low income families in the United States arrive at kindergarten already far behind their more affluent peers on measures of school readiness. In the absence of any federal preschool policy and amidst alarm about this growing divide, universal prekindergarten (UPK) programs have been launched around the United States,…

Steven Barnett and Clive Belfield examine the effects of preschool education on social mobility in the United States. They note that under current policy three- and four-year-old children from economically and educationally disadvantaged families have higher preschool attendance rates than other children. But current programs fail to enroll even…