To cite package ‘clubSandwich’ in publications use:

Pustejovsky JE (2026). clubSandwich: Cluster-Robust (Sandwich) Variance Estimators with Small-Sample Corrections. R package version 0.7.0.9000, https://github.com/jepusto/clubsandwich.

Corresponding BibTeX entry:

  @Manual{,
    title = {clubSandwich: Cluster-Robust (Sandwich) Variance
      Estimators with Small-Sample Corrections},
    author = {James E. Pustejovsky},
    year = {2026},
    note = {R package version 0.7.0.9000},
    url = {https://github.com/jepusto/clubsandwich},
  }