Metodbevispost

Multi-period Difference-in-differences

Multi-period Difference-in-Differences extends the classic two-period DiD framework to settings where units adopt treatment at different points in time. Formalised by Callaway and Sant'Anna (2021) and Goodman-Bacon (2021), it decomposes the overall treatment effect into group-time average treatment effects and addresses the bias that arises when conventional two-way fixed-effects regressions are applied to staggered adoption designs.

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Multi-period Difference-in-Differences with Staggered Adoption

Taxonomisk metodpost · regression-model / causal-inference

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