The states exhibit policy variations affecting school districts' local environment. This paper develops a theoretical model demonstrating that bias induced by omitting relevant state characteristics is greater in state-level analyses than in less aggregate studies. Aggregation to the state level inflates the coefficients on school input variables.…

This briefing book from the Children's Defense Fund contains factsheets on child care and early education issues. Areas covered include basic facts about early childhood education and care; their importance to children, families, and communities; some of the challenges facing families who need day care; and key child care and early education…