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Tag: imbalance

  • Robust X-Learner: Breaking the Curse of Imbalance and Heavy Tails via Robust Cross-Imputation

    Robust X-Learner: Breaking the Curse of Imbalance and Heavy Tails via Robust Cross-Imputation arXiv:2601.15360v1 Announce Type: new Abstract: Estimating Heterogeneous Treatment Effects (HTE) in industrial applications such as AdTech and healthcare presents a dual challenge: extreme class imbalance and heavy-tailed outcome distributions. While the X-Learner framework effectively addresses imbalance through cross-imputation, we demonstrate that it…

  • A Theoretical and Empirical Taxonomy of Imbalance in Binary Classification

    A Theoretical and Empirical Taxonomy of Imbalance in Binary Classification arXiv:2601.04149v1 Announce Type: new Abstract: Class imbalance significantly degrades classification performance, yet its effects are rarely analyzed from a unified theoretical perspective. We propose a principled framework based on three fundamental scales: the imbalance coefficient $eta$, the sample–dimension ratio $kappa$, and the intrinsic separability $Delta$.…

  • Credit Card Fraud Detection with Different Sampling Techniques

    Credit Card Fraud Detection with Different Sampling Techniques How to deal with imbalanced data Photo by Bermix Studio on Unsplash Credit card fraud detection is a plague that all financial institutions are at risk with. In general fraud detection is very challenging because fraudsters are coming up with new and innovative ways of detecting fraud, so…