To cite the underdisp package in publications use:

  Bagozzi, B.E. (2026). underdisp: Diagnostics and Models for
  Underdispersed Count Data. R package version 0.1.1.
  https://CRAN.R-project.org/package=underdisp

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {underdisp: Diagnostics and Models for Underdispersed Count Data},
    author = {Benjamin E. Bagozzi},
    year = {2026},
    note = {R package version 0.1.1},
    url = {https://CRAN.R-project.org/package=underdisp},
  }

The at-risk screen, the calibrated threshold, and the fixed-effects
results are developed in:

  Bagozzi, B.E. (2026). Revisiting underdispersion in political
  science. Working paper.

A BibTeX entry for LaTeX users is

  @Unpublished{,
    title = {Revisiting underdispersion in political science},
    author = {Benjamin E. Bagozzi},
    year = {2026},
    note = {Working paper},
  }