To cite package ‘rd2d’ in publications use:

  Cattaneo M, Titiunik R, Yu R (2026). _rd2d: Estimation and Inference
  for Boundary Discontinuity Designs_. R package version 1.0.0,
  <https://CRAN.R-project.org/package=rd2d>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rd2d: Estimation and Inference for Boundary Discontinuity Designs},
    author = {Matias D. Cattaneo and Rocio Titiunik and Ruiqi Rae Yu},
    year = {2026},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=rd2d},
  }