Author

Hongyu Chen

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Aug 2026

EXPRESS: Assortment Display, Price Competition and Fairness in Online Marketplaces

Online platforms often expand their seller base to offer greater product variety and serve heterogeneous consumer preferences. However, a larger seller base can also intensify price competition among sellers and reduce platform revenue. Building on the literature on assortment reduction, we study whether platforms can...

Hongyu Chen, Hanwei Li, D. Simchi-Levi et al. · Production and operations ma... · 1 citation

#machine learning Preprint Feb 2026

AI-Generated Measurements for Identification and Inference with Missing Data: A Weak Shadow Variable Approach

This work develops an assumption-lean partial identification framework that uses such measurements as weak shadow variables, defined as outcome-informative proxies that are conditionally independent of missingness given the true outcome and observed covariates.

Hongyu Chen, David Simchi-Levi, Ruoxuan Xiong · 1 citation