G. F. Fan

Conformal@K: Distribution-Free Top-K Miss-Risk Control for Recommendation with Overlapping-Group and Two-Stage Guarantees

2026 · ACM Transactions on Information Systems

We present Conformal@K , a model-agnostic calibration layer that provides distribution-free, finite-sample control of Top- \(K\) miss-risk in two-stage recommendation and retrieval. Given arbitrary retrieval and re-ranking scorers, Conformal@K selects monotone budgets so that, at …