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Direct linkHansen, Henrik; Klejnstrup, Ninja Ritter; Andersen, Ole Winckler – American Journal of Evaluation, 2013
There is a long-standing debate as to whether nonexperimental estimators of causal effects of social programs can overcome selection bias. Most existing reviews either are inconclusive or point to significant selection biases in nonexperimental studies. However, many of the reviews, the so-called "between-studies," do not make direct…
Descriptors: Foreign Countries, Developing Nations, Outcome Measures, Comparative Analysis
