To cite ei.Datasets in publications use:

Pavía JM (2022). “ei.Datasets: Real datasets for assessing ecological inference algorithms.” Social Science Computer Review, 40(1), 247–260. https://doi.org/10.1177/08944393211040808.

Corresponding BibTeX entry:

  @Article{,
    title = {ei.Datasets: Real datasets for assessing ecological
      inference algorithms.},
    author = {Jose M. Pavía},
    journal = {Social Science Computer Review},
    year = {2022},
    volume = {40},
    number = {1},
    pages = {247--260},
    url = {https://doi.org/10.1177/08944393211040808},
  }