To cite package ‘PSPI’ in publications use:

Zou J, Chen Q, Schwartz J, Moise N, Little R (2025). PSPI: Propensity Score Predictive Inference for Generalizability. R package version 1.2, https://github.com/zjg540066169/pspi.

Corresponding BibTeX entry:

  @Manual{,
    title = {PSPI: Propensity Score Predictive Inference for
      Generalizability},
    author = {Jungang Zou and Qixuan Chen and Joseph Schwartz and
      Nathalie Moise and Roderick Little},
    year = {2025},
    note = {R package version 1.2},
    url = {https://github.com/zjg540066169/pspi},
  }