To cite package ‘states’ in publications use:

Beger A (2025). states: Create Panels of Independent States. R package version 0.3.3, https://github.com/andybega/states.

Corresponding BibTeX entry:

  @Manual{,
    title = {states: Create Panels of Independent States},
    author = {Andreas Beger},
    year = {2025},
    note = {R package version 0.3.3},
    url = {https://github.com/andybega/states},
  }