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How Much Can We Generalize From Impact Evaluations?

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  • Eva Vivalt
Abstract
Impact evaluations can help to inform policy decisions, but they are rooted in particular contexts and to what extent they generalize is an open question. I exploit a new data set of impact evaluation results and find a large amount of effect heterogeneity. Effect sizes vary systematically with study characteristics, with government-implemented programs having smaller effect sizes than academic or non-governmental organization-implemented programs, even controlling for sample size. I show that treatment effect heterogeneity can be appreciably reduced by taking study characteristics into account.

Suggested Citation

  • Eva Vivalt, 2020. "How Much Can We Generalize From Impact Evaluations?," Journal of the European Economic Association, European Economic Association, vol. 18(6), pages 3045-3089.
    • Handle: RePEc:oup:jeurec:v:18:y:2020:i:6:p:3045-3089.
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    File URL: http://hdl.handle.net/10.1093/jeea/jvaa019
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