3 papers
stat.ML2026
Attack-Resistant Uniform Fairness for Linear and Smooth Contextual Bandits
Qingwen Zhang, Wenjia Wang
Modern digital platforms use contextual bandits to allocate valuable exposure and opportunities among competing participants. Fair treatment is therefore an important concern, yet…
stat.ML2025
SPARKLE: A Nonparametric Approach for Online Decision-Making with High-Dimensional Covariates
Wenjia Wang, Qingwen Zhang, Xiaowei Zhang
Personalized services are central to today's digital economy, and their sequential decisions are often modeled as contextual bandits. Modern applications pose two main challenges:…
math.ST2024
Sobolev Calibration of Imperfect Computer Models
Qingwen Zhang, Wenjia Wang
Calibration refers to the statistical estimation of unknown model parameters in computer experiments, such that computer experiments can match underlying physical systems. This wor…