To cite the chained difference-in-differences estimator implemented by
cdid, please use:

  Bellego C., Benatia D., and V. Dortet-Bernadet (2025). "The Chained
  Difference-in-Differences." Journal of Econometrics 248, 105783.
  doi:10.1016/j.jeconom.2024.105783.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {The Chained Difference-in-Differences},
    author = {Christophe Bellego and David Benatia and Vincent Dortet-Bernadet},
    year = {2025},
    journal = {Journal of Econometrics},
    volume = {248},
    pages = {105783},
    doi = {10.1016/j.jeconom.2024.105783},
  }

Ordinary mode delegates to the did package; for those estimators please
also cite:

  Callaway B. and P. H. C. Sant'Anna (2021). "Difference-in-Differences
  with Multiple Time Periods." Journal of Econometrics 225(2), 200-230.
  doi:10.1016/j.jeconom.2020.12.001.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Difference-in-Differences with Multiple Time Periods},
    author = {Brantly Callaway and Pedro H. C. Sant'Anna},
    year = {2021},
    journal = {Journal of Econometrics},
    volume = {225},
    number = {2},
    pages = {200--230},
    doi = {10.1016/j.jeconom.2020.12.001},
  }