fect

2.4.5

Fixed Effects Counterfactual Estimators

2packages depend

21.5Kdownloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Yiqing XuFirst published 2022-10-146 releasesCRAN page ↗GitHub ↗

Provides tools for estimating causal effects in panel data using counterfactual methods, as well as other modern DID estimators. It is designed for causal panel analysis with binary treatments under the parallel trends assumption. The package supports scenarios where treatments can switch on and off and allows for limited carryover effects. It includes several imputation estimators, such as Gsynth (Xu 2017), linear factor models, and the matrix completion method. Detailed methodology is described in Liu, Wang, and Xu (2024) doi:10.48550/arXiv.2107.00856 and Chiu et al. (2025) doi:10.48550/arXiv.2309.15983. Optionally integrates with the "HonestDiDFEct" package for sensitivity analyses compatible with imputation estimators. "HonestDiDFEct" is not on CRAN but can be obtained from https://github.com/lzy318/HonestDiDFEct.

Install

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

install.packages("fect", 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("xuyiqing/fect")

Development version from xuyiqing/fect. 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-fect

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-fect

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-fect

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

Health

CRAN checks

13OK

Slowest check: 10.5 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.48

not tracked

Coverage

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-06-09
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-08
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-04-25
12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-04-22
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-18
10 OK · 3 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE

Show 1 earlier snapshots

NOTE2026-03-10
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesNopkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 46%
Documented parameters: 99%
Return-value docs: 93%
References docs: 50%

Downloads

21.5K

CRAN downloads in the past year

Rank #2,590 · ~59/day · ~1.8K/mo

Releases R versions

Daily download trend is not available in this view yet.

2.5K30 days

8.3K90 days

21.5K1 year

Compare downloads with other packages →

Also on706 r2u27 autocran

Repository

GitHub ↗ xuyiqing/fect

83Stars

29Forks

1Open issues

1Open PRs

5Releases

510Commits

12Contributors

510 commits · Last activity 2026-07-15 · +1.2% stars, 30d

Stars over time

2025-06-16 · 692026-07-07 · 83

Repository practices

Upstream repositoryBeta

3 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/xuyiqing/fect on 2026-07-19.

Continuous integration (1)

GitHub Actions

Docs source (1)

README.Rmd

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

27 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.1.0

Imports (22)

Rcpp ggplot2 GGally doParallel doFuture foreach abind (>= 1.4-0)codetoolsMASSgridExtragridfixest doRNG future parallelly mvtnorm dplyr future.apply reshape2 rlang scalessplines

LinkingTo (2)

Rcpp RcppArmadillo

Suggests (7)

panelView testthat did DIDmultiplegtDYN ggrepel HonestDiDFEct withr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

2direct

0indirect

gsynth nonabsdid

Code & Tests

Code Composition

R 48,156 (87%)C++ 4,885 (9%)Rd 2,118 (4%)C 60 (0%)

Code characteristics

Object systems

S38

Cyclomatic complexity: 3.0 median / 1,221 max
Test cases: 551 / 0.48 per code line

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

257 14 exported

Complexity

33.4 avg / 1221 max

Call network

257 nodes / 265 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

Per-function coverage is not measured for this package yet.

Datasets

Bundled datasets · 10

Name	Class	Rows × Cols	Also ships in
gs2020	tbl_df/tbl/data.frame	7,007 × 9	–
hh2019	data.frame	22,971 × 4	–
sim_base	data.frame	7,000 × 18	–
sim_gsynth	data.frame	1,500 × 15	in 2 packages
sim_linear	data.frame	10,000 × 4	–
sim_region	data.frame	9,189 × 6	–
sim_trend	data.frame	10,000 × 4	–
simdata	data.frame	7,000 × 18	–
simgsynth	data.frame	1,500 × 15	in 2 packages
turnout	data.frame	1,128 × 6	in 3 packages

People & History

People (7)

Maintainer (1)

Yiqing Xu

Author, Maintainer

Authors (7)

Yiqing Xu

Author, Maintainer

Shiyun Hu

Author · added in 2.0.5

Rivka Lipkovitz

Author · added in 2.0.5

Licheng Liu

Author

Ziyi Liu

Author

Tianzhu Qin

Author · added in 2.0.5

Ye Wang

Author

Package Timeline

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

2.4.5Latest
2026-05-30 · current release · diff ↗
2.4.1
2026-04-30 · diff ↗
R
R 4.6.0 released · 2026-04-24
2.2.0
2026-03-27 · diff ↗
2.1.0
2026-01-17 · diff ↗
2.0.5
2025-08-25 · diff ↗
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
1.0.0
2022-10-14
R
R 4.2.0 released · 2022-04-22

Package metadata

First published: 2022-10-14
Total releases: 6 / 4 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 4.1.0
Bundled data: 1.1 MB / 10 files
Download size: 1.3 MB
Installed size: not tracked yet
With dependencies: not tracked yet

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