arXiv 16 Apr 2018 · Econometrics · publishedJournal of Econometrics (2020) · 5,002 citations (OpenAlex)
arXiv:1804.05785 · PDF · DOI · OpenAlex · Extracted main text
To estimate the dynamic effects of an absorbing treatment, researchers often use two-way fixed effects regressions that include leads and lags of the treatment. We show that in settings with variation in treatment timing across units, the coefficient on a given lead or lag can be contaminated by effects from other periods, and apparent pretrends can arise solely from treatment effects heterogeneity. We propose an alternative estimator that is free of contamination, and illustrate the relative shortcomings of two-way fixed effects regressions with leads and lags through an empirical application.
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| Reference | Intensity | Mentions | Sections | Main text | |
|---|---|---|---|---|---|
| 1 | Callaway and Sant'Anna (2020) Difference-in-Differences With Multiple Time Periods and an Application on the Minimum Wage and Employment | 1.000 | 18 | 4 | 100% |
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| 5 | Athey and Imbens (2018) Design-based Analysis in Difference-In-Differences Settings with Staggered Adoption | 0.874 | 9 | 2 | 100% |
| 6 | Goodman-Bacon (2018) Difference-in-Differences with Variation in Treatment Timing | 0.874 | 8 | 2 | 100% |
| 7 | de Chaisemartin and D'Haultfuille (2020) Two-Way Fixed Effects Estimators with Heterogeneous Treatment Effects | 0.874 | 7 | 2 | 100% |
| 8 | Bailey and Goodman-Bacon (2015) The War on Poverty's Experiment in Public Medicine: Community Health Centers and the Mortality of Older Americans | 0.644 | 2 | 2 | 100% |
| 9 | Heckman, Ichimura and Todd (1997) Matching As An Econometric Evaluation Estimator: Evidence from Evaluating a Job Training Programme | 0.644 | 2 | 2 | 100% |
| 10 | Abadie (2005) Semiparametric Difference-in-Differences Estimators | 0.644 | 2 | 2 | 100% |
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