2 papers
stat.ME2025
A tutorial for propensity score weighting methods under violations of the positivity assumption
Yi Liu, Yuan Wang, Ying Gao +2
Violations of the positivity assumption can render conventional causal estimands unidentifiable, including the average treatment effect (ATE), the average treatment effect on the t…
stat.ME2025
Variance Estimation for Weighted Average Treatment Effects
Huiyue Li, Yi Liu, Yunji Zhou +3
Common variance estimation methods for weighted average treatment effects (WATEs) in observational studies include nonparametric bootstrap and model-based, closed-form sandwich var…