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Author

Hongyu Chen

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Aug 2026

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

This work develops a Stackelberg game in which the platform chooses the display policy, and sellers subsequently set prices in response to the competitors they face within their assigned partition, and develops an algorithm that effectively solves seller partitions, traffic allocation, and equilibrium prices.

Hongyu Chen, Hanwei Li, D. Simchi-Levi et al. · 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

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