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econ.EM2026
Matched Triple-Differences: A Framework for Covariate Adjustment
Yihong Liu
A common empirical strategy in triple-differences (DDD) is to include either covariate trends or covariate levels to a three-way fixed effects (3WFE) regression. This strategy is t…
econ.EM2026
Post-Matching Two-Way Fixed Effects Estimation
Yihong Liu, Gonzalo Vazquez-Bare
When estimating treatment effects with two-way fixed effects (2WFE) models, researchers often use matching as a pre-processing step when the parallel trends assumption is thought t…