To cite the PSTR package or its underlying methodology, please use the
following references:

  Yang Y (2017). _PSTR: Panel Smooth Transition Regression Modelling_.
  doi:10.32614/CRAN.package.PSTR
  <https://doi.org/10.32614/CRAN.package.PSTR>. R package version 2.0.0
  (CRAN release 2026-02-27), <https://CRAN.R-project.org/package=PSTR>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PSTR: Panel Smooth Transition Regression Modelling},
    author = {Yukai Yang},
    year = {2017},
    note = {R package version 2.0.0 (CRAN release 2026-02-27)},
    doi = {10.32614/CRAN.package.PSTR},
    url = {https://CRAN.R-project.org/package=PSTR},
  }

  González A, Teräsvirta T, van Dijk D, Yang Y (2005). “Panel Smooth
  Transition Regression Models.” Technical Report 604, Stockholm School
  of Economics. Revised October 2017,
  <https://swopec.hhs.se/hastef/papers/hastef0604.pdf>.

A BibTeX entry for LaTeX users is

  @TechReport{,
    title = {Panel Smooth Transition Regression Models},
    author = {Andrés González and Timo Teräsvirta and Dick {van Dijk} and Yukai Yang},
    institution = {Stockholm School of Economics},
    series = {EFI Working Paper Series in Economics and Finance},
    number = {604},
    year = {2005},
    note = {Revised October 2017},
    url = {https://swopec.hhs.se/hastef/papers/hastef0604.pdf},
  }