Natural and Quasi- Experiments in Economics
Natural and Quasi- Experiments in Economics
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DOI：
10.1080/07350015.1995.10524589
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发表时间：
1994-12
期刊：
影响因子：
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通讯作者：
Bruce D. Meyer
中科院分区：
文献类型：
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作者：
Bruce D. Meyer
最近的许多经济学研究使用随机实验后的研究设计模式，对非随机分配的治疗组和对照组的结果进行了研究。通过使用由州法律、政府草案机制或其他手段的变化所产生的解释变量的变化，这些研究获得了易于检验的、可能是外生的变化。本文介绍了这些研究的优点，并建议如何改进。它还提供了判断他们得出的推论的有效性的帮助。设计并发症，如多个治疗和比较组和多个干预前或干预后的观察主张。
Using research designs patterned after randomized experiments, many recent economic studies examine outcome measures for treatment groups and comparison groups that are not randomly assigned. By using variation in explanatory variables generated by changes in state laws, government draft mechanisms, or other means, these studies obtain variation that is readily examined and is plausibly exogenous. This paper describes the advantages of these studies and suggests how they can be improved. It also provides aids in judging the validity of inferences they draw. Design complications such as multiple treatment and comparison groups and multiple pre- or post-intervention observations are advocated.