etwfe: Extended Two-Way Fixed Effects

Convenience functions for implementing extended two-way fixed effect regressions a la Wooldridge (2023, 2025) <doi:10.1093/ectj/utad016>, <doi:10.1007/s00181-025-02807-z>.

Version: 0.6.1
Imports: fixest (≥ 0.13.2), data.table (≥ 1.15.0), Formula, marginaleffects (≥ 0.29.0), stats, tinyplot (≥ 0.6.0)
Suggests: broom, did (≥ 2.3.0), ggplot2, knitr, modelsummary (≥ 2.2.0), rmarkdown, tinytest
Published: 2026-03-16
DOI: 10.32614/CRAN.package.etwfe
Author: Grant McDermott ORCID iD [aut, cre], Frederic Kluser [ctb], Ulrich Morawetz [ctb]
Maintainer: Grant McDermott <contact at grantmcdermott.com>
BugReports: https://github.com/grantmcdermott/etwfe/issues
License: MIT + file LICENSE
URL: https://grantmcdermott.com/etwfe/
NeedsCompilation: no
Materials: README, NEWS
In views: Econometrics
CRAN checks: etwfe results

Documentation:

Reference manual: etwfe.html , etwfe.pdf
Vignettes: Introduction to etwfe (source, R code)

Downloads:

Package source: etwfe_0.6.1.tar.gz
Windows binaries: r-devel: etwfe_0.6.0.zip, r-release: etwfe_0.6.0.zip, r-oldrel: etwfe_0.6.1.zip
macOS binaries: r-release (arm64): etwfe_0.6.0.tgz, r-oldrel (arm64): etwfe_0.6.1.tgz, r-release (x86_64): etwfe_0.6.0.tgz, r-oldrel (x86_64): etwfe_0.6.0.tgz
Old sources: etwfe archive

Linking:

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