Hundreds of millions of children in less developed countries suffer from poor health and nutrition. Children in most less developed countries also complete far fewer years of schooling, and learn less per year of schooling, than do children in developed countries. Recent research has shown that...

In developing countries, rising incomes, increased demand for more skilled labor, and government investments of considerable resources on building and equipping schools and paying teachers have contributed to global convergence in enrollment rates and completed years of schooling. Nevertheless,...