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math.ST2024★ 1 cited
Is Cross-Validation the Gold Standard to Evaluate Model Performance?
Garud Iyengar, Henry Lam, Tianyu Wang
Cross-Validation (CV) is the default choice for evaluating the performance of machine learning models. Despite its wide usage, their statistical benefits have remained half-underst…
math.OC2024
Contextual Optimization under Covariate Shift: A Robust Approach by Intersecting Wasserstein Balls
Tianyu Wang, Ningyuan Chen, Chun Wang
In contextual optimization, a decision-maker leverages contextual information, often referred to as covariates, to better resolve uncertainty and make informed decisions. In this p…