According to T.W. Schultz, the returns to human capital are highest in economic environments experiencing unexpected price, productivity, and technology shocks that create "disequilibria." In such environments, the ability of firms and individuals to adapt their resource allocations to shocks...

"Many educators and policymakers have argued for lenient grade promotion policy - even automatic promotion - in developing country settings where grade retention rates are high. The argument assumes that grade retention discourages persistence or continuation in school and that the promotion of...

"Impact evaluations aim to measure the outcomes that can be attributed to a specific policy or intervention. Although there have been excellent reviews of the different methods that an evaluator can choose in order to estimate impact, there has not been sufficient attention given to questions...