To cite package ‘neverhpfilter’ in publications use:

Shea J (2025). neverhpfilter: An Alternative to the Hodrick-Prescott Filter. R package version 0.5-0, https://github.com/justinmshea/neverhpfilter.

Corresponding BibTeX entry:

  @Manual{,
    title = {neverhpfilter: An Alternative to the Hodrick-Prescott
      Filter},
    author = {Justin M. Shea},
    year = {2025},
    note = {R package version 0.5-0},
    url = {https://github.com/justinmshea/neverhpfilter},
  }