… Randomized evaluations can be used to measure impact in … more than 1,100 randomized
evaluations studying policies in ten … It includes guidance on when randomized evaluations can …

… This article provides an introductory overview of the most frequently used impact evaluation
methods… and academics by introducing key vocabulary and concepts used in rigorous impact …

… Section 3 explains how randomized … randomized evaluations: the level of randomization,
and the need for statistical power. Section 7 focuses on the limits and criticisms of randomized …

… The six randomized evaluations in this volume use a variety of sampling, data collection,
experimental design, and econometric strategies to identify causal effects of expanded access …

… The problem was chronic in evaluation of many employment programs of the 1960s and
1970s. Further, the randomization feature helped to avoid a major problem encountered in …

… likely to be strong candidates for randomized evaluations; this paper uses the case …
randomized evaluations. But we argue that there is currently a tremendous imbalance in evaluation …

… The randomized introduction of an extra teacher in rural Indian nonformal education centers
(discussed in Section 2.5) also did not significantly improve test scores, although this effect …

… a rigorous randomization … the introduction of all possible postrandomization biases. In
the following sections, we highlight the main potential sources of bias (pre- and post-randomization…

… We discuss how carefully constructed randomized evaluations address these issues. … A
natural opportunity for introducing randomization occurs when there are limited resources or …

… , but it seems that our confidence in its correctness would increase with each evaluation.
In the context of randomized computation, there is some foundation for this viewpoint, namely …