Randomized control trials (RCTs) have become increasingly important as an evidence-based method to evaluate interventions such as government programs and policy initiatives. Frequently, however, RCTs are characterized by "imperfect compliance," in that not all the subjects who are randomly...

In recent years, randomized controlled trials have become increasingly popular in the social sciences. In development economics in particular, their use has attracted considerable debate in relation to the identification of 'what works' in development policy. This paper focuses on a core topic...

Between 1970 and the early 2000s, there was a revolution in support for the use of field experiments to evaluate social programs. Focusing on the welfare reform studies that helped to speed that transformation in the United States, this chapter describes the major challenges to implementing...

We examine the impact of a large, randomized Girls' Education Challenge (GEC) project in rural Zimbabwe. The multifaceted project initially provided information about girls' rights and education barriers to girls, parents, teachers, and others. Later, the project introduced a learn-to-read...