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Estimating dynamic treatment effects in event studies with heterogeneous treatment effects

Sun, Liyang ; Abraham, Sarah

Journal of econometrics, 2021-12, Vol.225 (2), p.175-199 [Periódico revisado por pares]

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Título:
Estimating dynamic treatment effects in event studies with heterogeneous treatment effects
Autor: Sun, Liyang ; Abraham, Sarah
Assuntos: Contamination ; Difference-in-differences ; Estimating techniques ; Impact analysis ; Pretrend test ; Quantitative analysis ; Regression analysis ; Timing ; Two-way fixed effects
É parte de: Journal of econometrics, 2021-12, Vol.225 (2), p.175-199
Descrição: 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.
Editor: Amsterdam: Elsevier B.V
Idioma: Inglês

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