1 code implementation • 6 Mar 2024 • Ying Jin, Zhimei Ren
In such cases, marginally valid conformal prediction intervals may not provide valid coverage for the focal unit(s) due to selection bias.
1 code implementation • 5 Mar 2023 • Yuetian Luo, Zhimei Ren, Rina Foygel Barber
Cross-validation (CV) is one of the most popular tools for assessing and selecting predictive models.
no code implementations • 19 Dec 2022 • Ying Jin, Zhimei Ren, Zhuoran Yang, Zhaoran Wang
Existing policy learning methods rely on a uniform overlap assumption, i. e., the propensities of exploring all actions for all individual characteristics are lower bounded in the offline dataset.
1 code implementation • 5 May 2021 • Ruohan Zhan, Zhimei Ren, Susan Athey, Zhengyuan Zhou
Learning optimal policies from historical data enables personalization in a wide variety of applications including healthcare, digital recommendations, and online education.
2 code implementations • 17 Mar 2021 • Emmanuel J. Candès, Lihua Lei, Zhimei Ren
Existing survival analysis techniques heavily rely on strong modelling assumptions and are, therefore, prone to model misspecification errors.
no code implementations • NeurIPS 2021 • Maria Dimakopoulou, Zhimei Ren, Zhengyuan Zhou
During online decision making in Multi-Armed Bandits (MAB), one needs to conduct inference on the true mean reward of each arm based on data collected so far at each step.
2 code implementations • 4 Dec 2020 • Zhimei Ren, Yuting Wei, Emmanuel Candès
Model-X knockoffs is a general procedure that can leverage any feature importance measure to produce a variable selection algorithm, which discovers true effects while rigorously controlling the number or fraction of false positives.
Feature Importance Variable Selection Methodology Applications
no code implementations • 27 Aug 2020 • Zhimei Ren, Zhengyuan Zhou
We study the problem of dynamic batch learning in high-dimensional sparse linear contextual bandits, where a decision maker, under a given maximum-number-of-batch constraint and only able to observe rewards at the end of each batch, can dynamically decide how many individuals to include in the next batch (at the end of the current batch) and what personalized action-selection scheme to adopt within each batch.
1 code implementation • NeurIPS 2019 • Zijun Gao, Yanjun Han, Zhimei Ren, Zhengqing Zhou
While the minimax regret for the two-armed stochastic bandits has been completely characterized in \cite{perchet2016batched}, the effect of the number of arms on the regret for the multi-armed case is still open.