To cite package ‘ddModel’ in publications use:

  Lin Y (2025). _ddModel: The Decision Diffusion Model_. R package
  version 0.2.9.0, <https://github.com/yxlin/ddmodel>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ddModel: The Decision Diffusion Model},
    author = {Yi-Shin Lin},
    year = {2025},
    note = {R package version 0.2.9.0},
    url = {https://github.com/yxlin/ddmodel},
  }