nonabsdid: Visualize Heterogeneity-Robust Event Studies for Non-Absorbing Treatments

Runs several heterogeneity-robust difference-in-differences (DID) event-study estimators for non-absorbing (i.e., treatment can switch on and off) binary treatments through their own packages, harmonizes their output onto a common time axis and tidy data structure, and overlays them in a single 'ggplot2' panel for visual comparison. Supported estimators include those provided by 'DIDmultiplegtDYN', 'PanelMatch', and 'fect', with an optional naive two-way fixed-effects reference series via 'fixest'. The underlying methods are respectively described in Clement de Chaisemartin and Xavier D'Haultfoeuille. "Difference-in-Differences Estimators of Intertemporal Treatment Effects." The Review of Economics and Statistics (2026) <doi:10.1162/rest_a_01414>, Kosuke Imai, In Song Kim, and Erik H. Wang. "Matching methods for causal inference with time‐series cross‐sectional data." American Journal of Political Science 67.3 (2023) <doi:10.1111/ajps.12685>, Licheng Liu, Ye Wang, and Yiqing Xu. "A practical guide to counterfactual estimators for causal inference with time‐series cross‐sectional data." American Journal of Political Science 68.1 (2024) <doi:10.1111/ajps.12723>, and Laurent R. Bergé, Kyle Butts, and Grant McDermott. "Fast and user-friendly econometrics estimations: The R package 'fixest'." arXiv preprint (2026) <doi:10.48550/arXiv.2601.21749>. A single nabs_event_study() wrapper runs any supported estimator with a common interface; nabs_event_study_simple() provides a one-line front door for quick exploratory runs; the S3 generic as_nabs_event_study() coerces estimator output into a tidy stable schema; and nabs_event_plot() overlays multiple methods on a single 'ggplot2' panel, with optional naive two-way fixed effects drawn in a neutral color as a reference.

Version:	0.3.2
Depends:	R (≥ 4.1.0)
Imports:	cli, dplyr, ggplot2, rlang, stats, tibble
Suggests:	DIDmultiplegtDYN, polars, PanelMatch, fect, fixest, knitr, rmarkdown, testthat (≥ 3.0.0), vdiffr, withr
Published:	2026-06-18
DOI:	10.32614/CRAN.package.nonabsdid
Author:	Takuma Iwasaki [aut, cre]
Maintainer:	Takuma Iwasaki <iwasakit at stanford.edu>
BugReports:	https://github.com/takuma1102/nonabsdid/issues
License:	MIT + file LICENSE
URL:	https://github.com/takuma1102/nonabsdid
NeedsCompilation:	no
Additional_repositories:	https://rpolars.r-universe.dev
Citation:	nonabsdid citation info
Materials:	README, NEWS
CRAN checks:	nonabsdid results

Documentation:

Reference manual:	nonabsdid.html , nonabsdid.pdf
Vignettes:	Getting started with nonabsdid (source, R code)

Downloads:

Package source:	nonabsdid_0.3.2.tar.gz
Windows binaries:	r-devel: nonabsdid_0.3.2.zip, r-release: nonabsdid_0.3.2.zip, r-oldrel: not available
macOS binaries:	r-release (arm64): nonabsdid_0.3.2.tgz, r-oldrel (arm64): nonabsdid_0.3.2.tgz, r-release (x86_64): nonabsdid_0.3.2.tgz, r-oldrel (x86_64): nonabsdid_0.3.2.tgz

Linking:

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