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 (may not be active yet) |
| 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:
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