R Observatory: Metrics for selectTWFE version 0.2.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

selectTWFE

0.2.1

Model Selection Between TWFE and ETWFE

0packages depend

658downloads / year

77.4%test coverage

13/13checks pass

Overview

About

Maintained by Paul von HippelFirst published 2026-06-021 releasesCRAN page ↗

Estimates both a vanilla two-way fixed effects (TWFE) model and an extended TWFE (ETWFE) model, then selects between them using Cochran's Q test for heterogeneity. When ETWFE wins, reports the heterogeneity fraction (I-squared) and cohort-time estimates with empirical Bayes shrinkage and Bonferroni multiplicity correction. Methods build on Wooldridge (2025) doi:10.1007/s00181-025-02807-z and Callaway and Sant'Anna (2021) doi:10.1016/j.jeconom.2020.12.001.

Install

R (CRAN)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("selectTWFE", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-selecttwfe

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-selectTWFE

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-selectTWFE

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 2.0 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 0.53

77.4%

Coverage · measured lines

100%

Documentation · exports

5

Dependencies · direct

Check history

OK2026-08-04
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-08-01
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-06-03
6 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: not tracked
Documented parameters: 100%
Return-value docs: 100%
References docs: 0%

Downloads

658

CRAN downloads in the past year

Rank #16,388 · ~2/day · ~55/mo

Releases R versions

Daily download trend is not available in this view yet.

10030 days

65890 days

6581 year

Compare downloads with other packages →

Also on13 r2u13 autocran

Dependencies

Declared dependencies

7 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.5.0

Imports (5)

etwfe fixest ggplot2 scalesstats

LinkingTo (0)

none

Suggests (3)

knitr rmarkdown testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Datasets

People & History

People (1)

Maintainer (1)

Paul von Hippel

Author, Maintainer

Authors (1)

Paul von Hippel

Author, Maintainer

Package Timeline

1 release. R releases are shown for context.

0.2.1Latest
2026-06-02 · current release
R
R 4.6.0 released · 2026-04-24

Package metadata

First published: 2026-06-02
Total releases: 1 / 1 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 3.5.0
Bundled data: 28 KB / 1 file
Download size: not tracked yet
Installed size: not tracked yet
With dependencies: not tracked yet

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("selectTWFE")

Format

von Hippel, P. (2026). selectTWFE: Model Selection Between TWFE and ETWFE (Version 0.2.1) [Computer software]. https://doi.org/10.32614/CRAN.package.selectTWFE

This is what citation() produces when a package has no citation file of its own. If it prints something else, use that.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for selectTWFE version 0.2.1 [Data set]. HJJB, LLC. Data release v2026-08-13. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-13, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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