3 papers
cs.GT2026
Mechanism Design for Decentralized Risk Detection: Strict Propriety, Network Coalitions, and the Backfiring Mandat
Jian Ni, Lecheng Zheng, John R Birge
Competing firms that share a population of risky customers face a decentralized risk detection problem in which each firm holds fragmentary information whose aggregation would gene…
cs.CE2025
Networked Markets, Fragmented Data: Adaptive Graph Learning for Customer Risk Analytics and Policy Design
Lecheng Zheng, Jian Ni, Chris Zobel +1
Financial institutions face escalating challenges in identifying high-risk customer behaviors within massive transaction networks, where fraudulent activities exploit market fragme…
cs.LG2024
Fair Anomaly Detection For Imbalanced Groups
Ziwei Wu, Lecheng Zheng, Yuancheng Yu +3
Anomaly detection (AD) has been widely studied for decades in many real-world applications, including fraud detection in finance, and intrusion detection for cybersecurity, etc. Du…