To cite package ‘ddml’ in publications use:

  Ahrens A, Hansen C, Schaffer M, Wiemann T (2024). _ddml:
  Double/Debiased Machine Learning_. R package version 0.3.0,
  <https://CRAN.R-project.org/package=ddml>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ddml: Double/Debiased Machine Learning},
    author = {Achim Ahrens and Christian B Hansen and Mark E Schaffer and Thomas Wiemann},
    year = {2024},
    note = {R package version 0.3.0},
    url = {https://CRAN.R-project.org/package=ddml},
  }