The package 'lfe' and its methods have been documented in several
papers. To cite 'lfe' in publications use one or some of:

  Gaure S (2013). “lfe: Linear group fixed effects.” _The R Journal_,
  *5*(2), 104-117. User documentation of the 'lfe' package,
  <https://journal.r-project.org/archive/2013/RJ-2013-031/RJ-2013-031.pdf>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{lfe}: Linear group fixed effects},
    author = {Simen Gaure},
    journal = {The R Journal},
    pages = {104-117},
    year = {2013},
    volume = {5},
    number = {2},
    note = {User documentation of the 'lfe' package},
    month = {Dec},
    url = {https://journal.r-project.org/archive/2013/RJ-2013-031/RJ-2013-031.pdf},
  }

  Gaure S (2013). “OLS with multiple high dimensional category
  variables.” _Computational Statistics & Data Analysis_, *66*, 8 - 18.
  ISSN 0167-9473, doi:10.1016/j.csda.2013.03.024
  <https://doi.org/10.1016/j.csda.2013.03.024>, Description of the
  projection methods used in 'lfe',
  <http://dx.doi.org/10.1016/j.csda.2013.03.024>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{OLS} with multiple high dimensional category variables},
    journal = {Computational Statistics & Data Analysis},
    volume = {66},
    pages = {8 - 18},
    year = {2013},
    note = {Description of the projection methods used in 'lfe'},
    issn = {0167-9473},
    doi = {10.1016/j.csda.2013.03.024},
    url = {http://dx.doi.org/10.1016/j.csda.2013.03.024},
    author = {Simen Gaure},
  }

  Gaure S (2014). “Correlation bias correction in two-way fixed effects
  linear regression.” _Stat_, *3*(1), 379-390. ISSN 2049-1573,
  doi:10.1002/sta4.68 <https://doi.org/10.1002/sta4.68>, Description of
  the limited mobility bias correction method used in 'lfe',
  <http://dx.doi.org/10.1002/sta4.68>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Correlation bias correction in two-way fixed effects linear regression},
    journal = {Stat},
    volume = {3},
    number = {1},
    url = {http://dx.doi.org/10.1002/sta4.68},
    doi = {10.1002/sta4.68},
    pages = {379-390},
    year = {2014},
    note = {Description of the limited mobility bias correction method used in 'lfe'},
    issn = {2049-1573},
    author = {Simen Gaure},
  }

  Gaure S (2024). _lfe: Linear Group Fixed Effects_. R package version
  3.0-0, 2024, <https://CRAN.R-project.org/package=lfe>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{lfe}: Linear Group Fixed Effects},
    author = {Simen Gaure},
    year = {2024},
    url = {https://CRAN.R-project.org/package=lfe},
    note = {R package version 3.0-0, 2024},
  }