Coupling Randomized Experiments and Approximations To Experiments in Social Program Evaluation

texts on quantitative methods of assessment. Highly regarded books on experimental design, for example, provide no explicit guidance for developing approximations to experiments, although they often recognize the common models underlying each perspective. Similarly, much of the work focusing on approximations to experiments or on quasi-experiments usually provides no information about how to couple randomized experiments with the approximations. The result seems to lead field