To cite spifa in publications, please cite both the methodology paper and the package:

Chacón-Montalván EA, Parry L, Giorgi E, Torres P, Orellana JDY, Moraga P, Taylor BM (2025). “Mapping food insecurity in the Brazilian Amazon using a spatial item factor analysis model.” The Annals of Applied Statistics, 19(4), 3438–3463. doi:10.1214/25-AOAS2072.

Chacón-Montalván EA (2026). spifa: Bayesian Spatial Item Factor Analysis. R package version 0.1.0, https://github.com/ErickChacon/spifa.

Corresponding BibTeX entries:

  @Article{,
    title = {Mapping food insecurity in the {B}razilian {A}mazon using
      a spatial item factor analysis model},
    author = {Erick A. Chacón-Montalván and Luke Parry and Emanuele
      Giorgi and Patricia Torres and Jesem Douglas Yamall Orellana and
      Paula Moraga and Benjamin M. Taylor},
    journal = {The Annals of Applied Statistics},
    year = {2025},
    volume = {19},
    number = {4},
    pages = {3438--3463},
    doi = {10.1214/25-AOAS2072},
  }

  @Manual{,
    title = {{spifa}: Bayesian Spatial Item Factor Analysis},
    author = {Erick A. Chacón-Montalván},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/ErickChacon/spifa},
  }