To cite package ‘pdR’ in publications use:

Tsung-wu H (2025). pdR: Threshold Model and Unit Root Tests in Cross-Section and Time Series Data. R package version 1.9.4, https://CRAN.R-project.org/package=pdR.

Corresponding BibTeX entry:

  @Manual{,
    title = {pdR: Threshold Model and Unit Root Tests in Cross-Section
      and Time Series Data},
    author = {Ho Tsung-wu},
    year = {2025},
    note = {R package version 1.9.4},
    url = {https://CRAN.R-project.org/package=pdR},
  }