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{did2s}: Two-Stage Difference-in-Differences

Kyle Butts and John Gardner

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Abstract: Recent work has highlighted the difficulties of estimating difference-in-differences models when treatment timing occurs at different times for different units. This article introduces the R package did2s which implements the estimator introduced in Gardner (2021). The article provides an approachable review of the underlying econometric theory and introduces the syntax for the function did2s. Further, the package introduces a function, event_study, that provides a common syntax for all the modern event-study estimators and plot_event_study to plot the results of each estimator.

Date: 2021-09, Revised 2022-05
New Economics Papers: this item is included in nep-ecm and nep-isf
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