To cite package ‘fereg’ in publications use:

Liu L (2026). fereg: Fast Fixed-Effects Estimation with the 'fixest' Interface. R package version 0.4.0, https://CRAN.R-project.org/package=fereg.

Corresponding BibTeX entry:

  @Manual{,
    title = {fereg: Fast Fixed-Effects Estimation with the 'fixest'
      Interface},
    author = {Leo Liu},
    year = {2026},
    note = {R package version 0.4.0},
    url = {https://CRAN.R-project.org/package=fereg},
  }