# ------------------------------------------------
# CITATION.cff file created with {cffr} R package
# See also: https://docs.ropensci.org/cffr/
# ------------------------------------------------
 
cff-version: 1.2.0
message: 'To cite package "cdid" in publications use:'
type: software
license: GPL-3.0-only
title: 'cdid: The Chained Difference-in-Differences'
version: 1.2.0.1
doi: 10.1016/j.jeconom.2024.105783
identifiers:
- type: doi
  value: 10.32614/CRAN.package.cdid
abstract: Estimates group-time average treatment effects in panels with missing outcomes
  by the chained difference-in-differences of Bellégo, Benatia and Dortet-Bernadet
  (2025) <https://doi.org/10.1016/j.jeconom.2024.105783>. It is a layer on the 'did'
  package that keeps the att_gt() and aggte() interface and adds an estimation mode.
  Chained estimation, the default for panel data, combines short within-unit comparisons
  by the generalized method of moments. It provides chained inverse probability weighting
  (IPW), outcome regression (OR) and doubly robust (DR) estimation, where OR and DR
  use separate or pooled regressions of the controls' outcome changes; custom IPW
  callbacks; correction for covariate-dependent missing outcomes by observation weighting,
  change imputation or their augmented combination; parallel trends from each cohort's
  reference period (PT-post) or from a chosen common start date (PT-all); and a chained
  conditional pretrend test through conditional_did_pretest(). Ordinary mode delegates
  unchanged to the Callaway and Sant'Anna (2021) <https://doi.org/10.1016/j.jeconom.2020.12.001>
  estimators in 'did'.
authors:
- family-names: Benatia
  given-names: David
  email: david.benatia@hec.ca
- family-names: Bellégo
  given-names: Christophe
  email: christophe.bellego@ensae.fr
- family-names: Cuerrier
  given-names: Joel
  email: cuerrier.j.clg@gmail.com
- family-names: Dortet-Bernadet
  given-names: Vincent
  email: vincent.dortet-bernadet@finances.gouv.fr
preferred-citation:
  type: article
  title: The Chained Difference-in-Differences
  authors:
  - family-names: Bellego
    given-names: Christophe
  - family-names: Benatia
    given-names: David
    email: david.benatia@hec.ca
  - family-names: Dortet-Bernadet
    given-names: Vincent
    email: vincent.dortet-bernadet@finances.gouv.fr
  year: '2025'
  journal: Journal of Econometrics
  volume: '248'
  doi: 10.1016/j.jeconom.2024.105783
  start: '105783'
repository: https://dvbn.r-universe.dev
repository-code: https://github.com/dvbn/cdid
commit: bdad198f120d2d7559a1f6b5738edbad376bb324
url: https://github.com/dvbn/cdid
date-released: '2026-11-07'
contact:
- family-names: Benatia
  given-names: David
  email: david.benatia@hec.ca
references:
- type: article
  title: Difference-in-Differences with Multiple Time Periods
  authors:
  - family-names: Callaway
    given-names: Brantly
  - family-names: Sant'Anna
    given-names: Pedro H. C.
  year: '2021'
  journal: Journal of Econometrics
  volume: '225'
  issue: '2'
  doi: 10.1016/j.jeconom.2020.12.001
  start: '200'
  end: '230'