G2TT
来源类型Discussion paper
规范类型论文
来源IDDP17247
DP17247 Revisiting Event Study Designs: Robust and Efficient Estimation
Kirill Borusyak; Xavier Jaravel; Jann Spiess
发表日期2022-04-24
出版年2022
语种英语
摘要We develop a framework for difference-in-differences designs with staggered treatment adoption and heterogeneous causal effects. We show that conventional regression-based estimators fail to provide unbiased estimates of relevant estimands absent strong restrictions on treatment-effect homogeneity. We then derive the efficient estimator addressing this challenge, which takes an intuitive “imputation” form when treatment-effect heterogeneity is unrestricted. We characterize the asymptotic behavior of the estimator, propose tools for inference, and develop tests for identifying assumptions. Extensions include time-varying controls, triple-differences, and certain non-binary treatments. We show the practical relevance of these insights in a simulation study and an application. Studying the consumption response to tax rebates in the United States, we find that the notional marginal propensity to consume is between 8 and 11 percent in the first quarter — about half as large as benchmark estimates used to calibrate macroeconomic models — and predominantly occurs in the first month after the rebate.
主题Labour Economics ; Macroeconomics and Growth
关键词Difference-in-differences Event study Imputation estimator Panel data
URLhttps://cepr.org/publications/dp17247
来源智库Centre for Economic Policy Research (United Kingdom)
资源类型智库出版物
条目标识符http://119.78.100.153/handle/2XGU8XDN/546254
推荐引用方式
GB/T 7714
Kirill Borusyak,Xavier Jaravel,Jann Spiess. DP17247 Revisiting Event Study Designs: Robust and Efficient Estimation. 2022.
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