Author

Sang-Su Lee

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Preprint Aug 2026

When Offline Evaluation Misleads: A Diagnostic Protocol for Reward and Policy Selection in Delayed-Feedback Contextual Bandits

Personalizing marketing messages with contextual multi-armed bandits (CMABs) drives real business value, yet the objective that ultimately matters - a downstream conversion - is observed only weeks later, too late to drive online learning. Teams therefore train the bandit on a fast proxy reward, and separately must jud...

Sang-Su Lee, V. Loganathan, Shishir Dash et al. · 0 citations

#artificial intelligence Preprint Aug 2026

Autoresearch for Marketplace Catalogs: From Legacy Forms to AI-Native Matching

This work presents an autoresearch loop that generates this taxonomy, one occupation at a time, and has been deployed in production at a major U.S. consumer services marketplace since April 2026, spanning 132 occupations.

Kartik Ravisankar, Hojat Abdolanezhad, D. Capo et al. · 0 citations