To cite package ‘fastdid’ in publications use:

  Tsai L (2024). _fastdid: Fast Staggered Difference-in-Difference
  Estimators_. R package version 0.9.9, ,
  <https://github.com/tsailintung/fastdid>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fastdid: Fast Staggered Difference-in-Difference Estimators},
    author = {Lin-Tung Tsai},
    year = {2024},
    note = {R package version 0.9.9, 
},
    url = {https://github.com/tsailintung/fastdid},
  }