3 papers
econ.EM2026
Causal Graphs for Conditional Parallel Trends
Michael C. Knaus, Henri Pfleiderer
Difference-in-Differences (DiD) is a widely used research design that often relies on a conditional parallel trends (CPT) assumption. In contrast to settings with unconfoundedness,…
econ.EM2026
Heterogeneity Analysis with Heterogeneous Treatments
Phillip Heiler, Michael C. Knaus
Analysis of effect heterogeneity at the group level is standard practice in empirical treatment evaluation. However, treatments analyzed are often aggregates of multiple underlying…
econ.EM2024
Treatment Effect Estimators as Weighted Outcomes
Michael C. Knaus
Estimators that weight observed outcomes to form effect estimates have a long tradition. Their outcome weights are widely used in established procedures, such as checking covariate…