Controlled experiments show class separability moderates oversampling effectiveness more strongly than imbalance ratio, challenging the IR-threshold paradigm.
C4.5, class imbalance, and cost sensitivity: Why under-sampling beats over-sampling,
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Beyond Imbalance Ratio: Data Characteristics as Critical Moderators of Oversampling Method Selection
Controlled experiments show class separability moderates oversampling effectiveness more strongly than imbalance ratio, challenging the IR-threshold paradigm.