Returns to investment in education based on human capital theory have been estimated systematically since the 1950s. In the 60-plus year history of such estimates, there have been several compilations in the literature. This paper reviews and highlights the latest trends and patterns based on a...

In the past decade, hundreds of impact evaluation studies have measured the learning outcomes of education interventions in developing countries. The impact magnitudes are often reported in terms of "standard deviations," making them difficult to communicate to policy makers beyond education...

Social scientists frequently rely on the cardinal comparability of test scores to assess achievement gaps between population subgroups and their evolution over time. This approach has been criticized due to the ordinal nature of test scores and the sensibility of results to order-preserving...