This paper proposes a framework that examines three levels of access to infrastructure-nominal, effective, and quality-adjusted access. Most conventional indicators measure nominal access-whether a household has physical access to a service in or near the house. By contrast, effective access...

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...