To cite ppsynth in publications use:

Grier, K. B. (2026). Correlated Weights: Partial Pooling for Synthetic Control with Multiple Outcomes. Working paper, Texas Tech University. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=7149398

Corresponding BibTeX entry:

  @Unpublished{,
    title = {Correlated Weights: Partial Pooling for Synthetic Control
      with Multiple Outcomes},
    author = {Kevin B. Grier},
    year = {2026},
    note = {Working paper, Texas Tech University},
    url =
      {https://papers.ssrn.com/sol3/papers.cfm?abstract_id=7149398},
  }