群体异质性下的变化-变化与分布合成控制方法
Group-Heterogeneous Changes-in-Changes and Distributional Synthetic Controls
AI总结:
本文提出了一种考虑群体异质性的变化-变化和分布合成控制方法,通过寻找具有相似群体特征的对照组来改进因果推断分析。
摘要:
我们开发了在存在群体层面异质性时的新变化-变化(CIC)和分布合成控制(DSC)类型方法。对于CIC,我们允许个体属于异质群体,扩展Athey和Imbens(2006)的工作,通过寻找与处理组共享相似群体层面未观测特征的适当对照组。对于DSC,我们表明合成控制单位不一定来自同一时期,如Gunsilius(2023)所述;它们可能来自不同时期,这些时期中它们具有与处理组相似的群体层面异质性。这些新方法的实施进行了简要讨论。
英文摘要:
We develop new changes-in-changes (CIC) and distributional synthetic controls (DSC) types of methods when there exists group-level heterogeneity. For CIC, we allow individuals to belong to heterogeneous groups, extending Athey and Imbens (2006) by finding appropriate control groups that share similar group-level unobserved characteristics to the treatment groups. For DSC, we show that the synthetic control units are not necessarily from the same period as in Gunsilius (2023); they may come from different periods in which they have comparable group-level heterogeneity to the treatment group. Implementation of these new methods is briefly discussed.
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