3 papers
cs.AI2026
Reconstructing Fraudulent Strategies in Online Payments via Interpretable Inverse Reinforcement Learning
Huilin He, Weiyu Han, Linbo Shao +4
Payment fraud causes financial losses and undermines users' trust in web payment services. Although fraud detection is a critical defense for payment security, complex and diverse…
cs.LG2026
TAPES: Task-Aligned Joint Predictive Pretraining for Transaction Event Sequences
Ruobing Zuo, Weiyu Han, Huilin He +6
Transaction event sequences support diverse prediction tasks in online commerce and digital financial services. The same transaction records can yield prediction targets with diffe…
cs.LG2026
Where Is a Prediction Model Miscalibrated, and for Whom? Local Audits in Outcome-Learned Pockets
Bernardo Modenesi, Taoyi Chen, Sima Najafzadehkhoei +3
Overall and group-level averages, and ranking metrics such as the AUC, can hide sets of observations for which a prediction model systematically over- or under-predicts. We present…