To cite package ‘Rcope’ in publications use:

  Obrzut A, Qian Y, Xie H (2026). _Rcope: Tools to Cope with
  Endogeneity Problems_. R package version 1.0.0,
  <https://CRAN.R-project.org/package=Rcope>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Rcope: Tools to Cope with Endogeneity Problems},
    author = {Anthony Obrzut and Yi Qian and Hui Xie},
    year = {2026},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=Rcope},
  }