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How Much Can We Generalize From Impact Evaluations?
Journal of the European Economic Association ( IF 3.9 ) Pub Date : 2020-09-19 , DOI: 10.1093/jeea/jvaa019
Eva Vivalt 1
Affiliation  

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.


中文翻译:

我们可以从影响评估中得出多少?

摘要
影响评估可以帮助制定政策决策,但它们植根于特定的环境,在多大程度上可以概括为一个悬而未决的问题。我使用了影响评估结果的新数据集,并发现了大量的影响异质性。效应的大小随研究特征而系统地变化,政府实施的计划的影响大小小于学术或非政府组织实施的计划,甚至控制样本量。我表明,通过考虑研究特征可以明显降低治疗效果的异质性。
更新日期:2020-09-19
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