fetwfe

1.10.0

Fused Extended Two-Way Fixed Effects

0packages depend

2.5Kdownloads / year

92.3%test coverage

13/13checks pass

Overview

About

Maintained by Gregory FalettoFirst published 2025-02-214 releasesCRAN page ↗GitHub ↗

Calculates the fused extended two-way fixed effects (FETWFE) estimator for unbiased and efficient estimation of difference-in-differences in panel data with staggered treatment adoption. This estimator eliminates bias inherent in conventional two-way fixed effects estimators, while also employing a novel bridge regression regularization approach to improve efficiency and yield valid standard errors. Also implements extended TWFE (etwfe) and bridge-penalized ETWFE (betwfe). Provides S3 classes for streamlined workflow and supports flexible tuning (ridge and rank-condition guarantees), automatic covariate centering/scaling, and detailed overall and cohort-specific effect estimates with valid standard errors. Includes simulation and formatting utilities, extensive diagnostic tools, vignettes, and examples. See Faletto (2025) (doi:10.48550/arXiv.2312.05985).

Install

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

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

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

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("gregfaletto/fetwfePackage")

Development version from gregfaletto/fetwfePackage. Installs pak first if it is not already available.

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-fetwfe

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-fetwfe

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-fetwfe

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

Health

CRAN checks

13OK

Slowest check: 6.2 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.81

92.3%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 182 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 15%
Documented parameters: 95%
Return-value docs: 100%
References docs: 29%

Downloads

2.5K

CRAN downloads in the past year

Rank #11,478 · ~7/day · ~209/mo

Releases R versions

Daily download trend is not available in this view yet.

24730 days

89990 days

2.5K1 year

Compare downloads with other packages →

Also on111 r2u23 autocran

Repository

GitHub ↗ gregfaletto/fetwfepackage

5Stars

1Forks

28Open issues

2Open PRs

0Releases

809Commits

2Contributors

809 commits · Last activity 2026-07-24 · 0% stars, 30d

Stars over time

2025-01-21 · 42026-07-07 · 5

Repository practices

Upstream repositoryBeta

7 development-tooling and community-health practices detected across 5 families in the upstream repository

Checks run against github.com/gregfaletto/fetwfepackage on 2026-07-30.

Continuous integration (1)

GitHub Actions

CRAN release process (2)

cran-comments.mdCRAN-SUBMISSION

Docs source (1)

README.Rmd

Lint, format, editor (2)

AirRStudio project

Show all practices

Git structural (1)

.gitattributes

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

14 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.1.0

Imports (4)

generics glmnet grpregMatrix

LinkingTo (0)

none

Suggests (11)

bacondecomp knitr rmarkdown dplyr did expm ggplot2 broom lme4 testthat tibble

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

People & History

People (1)

Maintainer (1)

Gregory Faletto

Author, Maintainer

Authors (1)

Gregory Faletto

Author, Maintainer

Package Timeline

4 releases. Pick two to compare their code metrics. R releases are shown for context.

1.10.0Latest
2026-05-24 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
1.5.0
2025-07-02 · diff ↗
1.0.0
2025-05-15 · diff ↗
R
R 4.5.0 released · 2025-04-11
0.4.4
2025-02-21
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2025-02-21
Total releases: 4 / 1 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 4.1.0
Download size: 154 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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