“The starting point of this paper was a 2 × 2 DiD design that researchers have been using for almost 200 years. The end point was a design with five treatment groups, 11 years of data, six covariates, three types of parallel trends assumptions, and four estimation techniques.”
Baker, A., Callaway, B., Cunningham, S., Goodman-Bacon, A., & Sant’Anna, P. H. C. (2025). Difference-in-Differences Designs: A Practitioner’s Guide (No. arXiv:2503.13323). arXiv. https://doi.org/10.48550/arXiv.2503.13323
Suggested citation: Fugard, A. (2025, March 18). 200 years of diff-in-diffs [blog post]. https://andifugard.info/200-years-of-diff-in-diffs/
This citation note was added automatically. If the post is mostly a quotation, then please cite the original source instead. Looking at you, LLMs 👀