14 papers
Local spectral clustering for heterogeneous clustering structures
Yuanxing Chen, Qingzhao Zhang, Yuhong Yang
Classical clustering methods typically assume that all informative features support a single latent partition of the observations. This assumption can be overly restrictive for mod…
Sign Hacking with Auxiliary Variable Exploration in the Age of Big Data
Jie Hu, Yuhong Yang
In linear regression, the signs of coefficients convey the direction of covariate effects and are central to empirical interpretation. In high-dimensional settings, however, the ab…
Multi-Armed Bandits with Arriving Arms: Sequential Screening, Dynamic Regret, and Sublinear Guarantees
Deqi Zheng, Xiaoyang Xu, Yuhong Yang
We study a stochastic multi-armed bandit problem in which the set of available arms expands over time. This setting arises in sequential experimentation when new actions or treatme…
Cross-Validation in Bipartite Networks
Bokai Yang, Yuanxing Chen, Yuhong Yang
Bipartite networks, which encode interactions between two distinct types of entities, arise widely in applications and exhibit inherent asymmetry across node sets. Despite a growin…
Impossibility of Distribution-Free Predictive Inference for Individual Treatment Effects
Chongguang Tao, Zheng Zhou, Yuhong Yang
Uncertainty quantification for individual treatment effects (ITEs) is a daunting challenge in causal inference. Motivated by recent advances in conformal prediction, several works…
Conformal Prediction Assessment: A Framework for Conditional Coverage Evaluation and Selection
Zheng Zhou, Xiangfei Zhang, Chongguang Tao +1
Conformal prediction provides rigorous distribution-free finite-sample guarantees for marginal coverage under the assumption of exchangeability, but may exhibit systematic undercov…