R packages

(Last checked: 08 Sep 2026)

Packages are sorted in alphabetical order by name. CRAN packages use the current CRAN release; GitHub packages are development or GitHub-only versions. Package documentation is identified in the Website column.

Name	Installation	Website	Package by	Reference paper
`bacondecomp`	`install.packages("bacondecomp")`	CRAN	Evan Flack; Ed Jee	Andrew Goodman-Bacon (2021). Difference-in-differences with variation in treatment timing. Journal of Econometrics.
`did` (2.5.1)	`install.packages("did")`	CRAN	Pedro H.C. Sant’Anna; Brantly Callaway	Brantly Callaway, Pedro H.C. Sant’Anna (2020). Difference-in-Differences with multiple time periods, Journal of Econometrics.
`did2s`	`install.packages("did2s")`	Link	Kyle Butts	John Gardner (2021). Two-stage differences in differences; Kirill Borusyak, Xavier Jaravel, Jann Spiess (2021). Revisiting Event Study Designs: Robust and Efficient Estimation; Liyang Sun, Sarah Abraham (2020). Estimating dynamic treatment effects in event studies with heterogeneous treatment effects. Journal of Econometrics; Brantly Callaway, Pedro H.C. Sant’Anna (2020). Difference-in-Differences with multiple time periods, Journal of Econometrics; Jonathan Roth, Pedro H.C. Sant’Anna (2021). Efficient Estimation for Staggered Rollout Designs.
`didimputation`	`install.packages` `("didimputation")`	Link	Kyle Butts	Kirill Borusyak, Xavier Jaravel, Jann Spiess (2021). Revisiting Event Study Designs: Robust and Efficient Estimation.
`DIDmultiplegt`	`install.packages("DIDmultiplegt")`	Link	Shuo Zhang	Clément de Chaisemartin, Xavier D’Haultfoeuille (2020). Two-Way Fixed Effects Estimators with Heterogeneous Treatment Effects. American Economic Review.
`DIDmultiplegtDYN` (2.4.0)	`install.packages("DIDmultiplegtDYN")`	CRAN and GitHub	Clément de Chaisemartin; Diego Ciccia; Xavier D’Haultfoeuille; Felix Knau; Mélitine Malézieux; Doulo Sow	Clément de Chaisemartin, Xavier D’Haultfoeuille (2026). Difference-in-Differences Estimators of Intertemporal Treatment Effects; de Chaisemartin et al. (2025) complex-design examples.
`DRDID` (1.3.0)	`install.packages("DRDID")`	CRAN	Pedro H.C. Sant’Anna; Jun Zhao	Pedro H.C. Sant’Anna, Jun Zhao (2020). Doubly robust difference-in-differences estimators, Journal of Econometrics.
`etwfe`	`install.packages("etwfe")`	Link	Grant McDermott	Jeffrey Wooldridge (2021). Two-Way Fixed Effects, the Two-Way Mundlak Regression, and Difference-in-Differences Estimators.. Working Paper.
`fixest` (0.14.2) with `sunab()`	`install.packages("fixest")`	CRAN	Laurent Bergé	Liyang Sun, Sarah Abraham (2020). Estimating dynamic treatment effects in event studies with heterogeneous treatment effects. Journal of Econometrics.
`gsynth`	`install.packages("gsynth")`	Link	Yiqing Xu; Licheng Liu	Yiqing Xu (2017). Generalized Synthetic Control Method: Causal Inference with Interactive Fixed Effects Models. Political Analysis.
`HonestDiD`	`remotes::install_github("asheshrambachan/HonestDiD")`	GitHub	Ashesh Rambachan; Jonathan Roth	Ashesh Rambachan, Jonathan Roth (2021). An Honest Approach to Parallel Trends.
`staggered`	`install.packages("staggered")`	Link	Jonathan Roth; Pedro H.C. Sant’Anna	Jonathan Roth, Pedro H.C. Sant’Anna (2021). Efficient Estimation for Staggered Rollout Designs.
`synthdid`	`remotes::install_github("synth-inference/synthdid")`	GitHub	David Hirshberg; Stefan Wager; Dmitry Arkhangelsky; Susan Athey; Guido Imbens	Dmitry Arkhangelsky, Susan Athey, David Hirshberg, Guido Imbens, Stefan Wager (2021). Synthetic Difference-in-Differences. American Economic Review.
`pretrends`	`remotes::install_github` `("jonathandroth/pretrends")`	Link	Jonathan Roth	Jonathan Roth (2021). Pre-test with Caution: Event-study Estimates After Testing for Parallel Trends.
`TwoWayFEWeights`	`install.packages("TwoWayFEWeights")`	Link	Clément de Chaisemartin; Diego Ciccia; Xavier D’Haultfoeuille; Felix Knau; Doulo Sow; Shuo Zhang	Clément de Chaisemartin, Xavier D’Haultfoeuille (2020). Two-Way Fixed Effects Estimators with Heterogeneous Treatment Effects. American Economic Review; Clément de Chaisemartin, Xavier D’Haultfoeuille (2021). Two-way fixed effects regressions with several treatments.
`YatchewTest`	`install.packages("YatchewTest")`	Link	Clément de Chaisemartin; Diego Ciccia; Xavier D’Haultfoeuille; Felix Knau; Doulo Sow	Yatchew (1997), de Chaisemartin and D’Haultfoeuille (2024b)