R Observatory: Metrics for selectTWFE version 0.2.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

selectTWFE

0.2.1Package record

Model Selection Between TWFE and ETWFE

0packages depend

1.3Kdownloads / year

77.4%test coverage

13/13flavors OK

Overview

About

Maintained by Paul von HippelCRAN 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. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

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). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 1.8 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-04
NOTE12 OK, 1 NOTE2026-08-01
OK6 OK2026-06-03

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.2.1

READMENoVignettesYes · 1 · dynamicNEWSYes · 100% structured · does not mention 0.2.1Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 6
Examples that run: no examples
Exported functions with examples: 0%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 0%

Vignettes (1)

Model Selection Between TWFE and ETWFE HTML

How these are measured

Downloads

1.3K

CRAN downloads in the past year

Rank #18,678 · ~3/day · ~106/mo

Releases R versions

Daily download trend is not available in this view yet.

26830 days

69390 days

1.3K1 year

Compare downloads with other packages →

Also on20 r2u6 autocran

How downloads are counted

Dependencies

Declared dependencies

7 external dependencies (excludes base and recommended)

Installing selectTWFE adds 33 packages (14 with compiled code, 36 MB of source tarballs). Heaviest: ggplot2 6.0 MB, data.table 5.7 MB, fixest 4.8 MB.

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.

How these are counted

Code & Tests

Datasets

People & History

People (1)

Paul von Hippel

Author, Maintainer since 0.2.1 (2026)

Releases (1)

0.2.1Latest
record
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: 82 KB

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 package has no citation file, so citation() returns this entry built from DESCRIPTION.

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 v2026-10-20. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-20, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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