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# CITATION file created with {cffr} R package
# See also: https://docs.ropensci.org/cffr/
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cff-version: 1.2.0
message: 'To cite package "nonabsdid" in publications use:'
type: software
license: MIT
title: 'nonabsdid: Visualize Heterogeneity-Robust Event Studies for Non-Absorbing
  Treatments'
version: 0.3.2
abstract: '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)
  <https://doi.org/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) <https://doi.org/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) <https://doi.org/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) <https://doi.org/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.'
authors:
- family-names: Iwasaki
  given-names: Takuma
  email: iwasakit@stanford.edu
  orcid: https://orcid.org/0009-0000-8782-4851
preferred-citation:
  type: manual
  title: 'nonabsdid: Heterogeneity-Robust DID Event Studies with Non-Absorbing Binary
    Treatments'
  authors:
  - family-names: Iwasaki
    given-names: Takuma
    email: iwasakit@stanford.edu
    orcid: https://orcid.org/0009-0000-8782-4851
  year: '2026'
  notes: R package version 0.3.2
  url: https://github.com/takuma1102/nonabsdid
repository: https://cran.r-universe.dev
repository-code: https://github.com/takuma1102/nonabsdid
commit: 95ee89b8c604e151844e7f23a391fae23cfc8035
url: https://github.com/takuma1102/nonabsdid
date-released: '2026-06-18'
contact:
- family-names: Iwasaki
  given-names: Takuma
  email: iwasakit@stanford.edu
  orcid: https://orcid.org/0009-0000-8782-4851