did2s: Two-Stage Difference-in-Differences Following Gardner (2021)
Estimates Two-way Fixed Effects difference-in-differences/event-study models using the approach proposed by Gardner (2021) <doi:10.48550/arXiv.2207.05943>. To avoid the problems caused by OLS estimation of the Two-way Fixed Effects model, this function first estimates the fixed effects and covariates using untreated observations and then in a second stage, estimates the treatment effects.
| Version: |
1.2.1 |
| Depends: |
R (≥ 3.5.0), fixest (≥ 0.13.2) |
| Imports: |
boot, broom, data.table, did, didimputation, dreamerr, ggplot2, HonestDiD, Matrix, rlang, staggered, stats |
| Suggests: |
haven, knitr, rmarkdown, testthat (≥ 3.0.0) |
| Published: |
2026-03-05 |
| DOI: |
10.32614/CRAN.package.did2s |
| Author: |
Kyle Butts  [aut,
cre],
John Gardner
[aut],
Grant McDermott
[ctb],
Laurent Berge [ctb] |
| Maintainer: |
Kyle Butts <buttskyle96 at gmail.com> |
| License: |
MIT + file LICENSE |
| URL: |
https://kylebutts.github.io/did2s/ |
| NeedsCompilation: |
no |
| Citation: |
did2s citation info |
| Materials: |
README, NEWS |
| In views: |
Econometrics |
| CRAN checks: |
did2s results |
Documentation:
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