K-12 education policy has recently received much scrutiny from policymakers, taxpayers, parents, and students. Reformers have often cited increases in spending with little noticeable gain in test scores, coupled with the fact that American students lag behind their foreign peers on standardized...

There is widespread concern about differences in the quality of state-run and private schooling. The concerns are especially severe in the numerous developing countries where much of the population has left state-provided schooling for private schooling, including many private schools not...