3 papers
stat.ME2026
Estimation and Inference of the Win Ratio for Two Hierarchical Endpoints Subject to Censoring and Missing Data
Yi Liu, Huiman Barnhart, Sean O'Brien +2
The win ratio (WR) is a widely used metric to compare treatments in randomized clinical trials with hierarchically ordered endpoints. Counting-based approaches, such as Pocock's al…
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…