To cite package ‘selectTWFE’ in publications use:

  von Hippel P (2026). _selectTWFE: Model Selection Between TWFE and
  ETWFE_. R package version 0.2.1,
  <https://CRAN.R-project.org/package=selectTWFE>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {selectTWFE: Model Selection Between TWFE and ETWFE},
    author = {Paul {von Hippel}},
    year = {2026},
    note = {R package version 0.2.1},
    url = {https://CRAN.R-project.org/package=selectTWFE},
  }