To cite package ‘achieveGap’ in publications use:

  Hait S (2026). _achieveGap: Modeling Achievement Gap Trajectories
  with Hierarchical Penalized Splines_. R package version 0.1.0,
  <https://github.com/causalfragility-lab/achievegap>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {achieveGap: Modeling Achievement Gap Trajectories with Hierarchical
Penalized Splines},
    author = {Subir Hait},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/causalfragility-lab/achievegap},
  }