Author

Shu-Han Liu

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Preprint Oct 2026

Doubly Robust Estimation and Inference for Longitudinal Win Probabilities with Ordinal Outcomes in Observational Studies

Repeated ordinal outcomes capture how treatment benefits and harms evolve over time. We develop doubly robust estimation and inference for visit-specific win probabilities and their prespecified weighted summaries, with Desirability of Outcome Ranking as a motivating example. Baseline confounding is addressed through a...

Shu-Han Liu, Maria Kudela, Margaret Gamalo et al. · 0 citations

Preprint Oct 2026

Global minimax rates for heterogeneous treatment effect estimation

Recent work established minimax rates for pointwise estimation of the conditional average treatment effect (CATE), but the fundamental limits under global losses remained unresolved. We derive matching minimax lower and upper bounds under the $L_2$ and $L_\infty$ risks on certain covariate-density and support classes....

Shu-Han Liu, Matey Neykov · 0 citations