A weak-signal sample can raise a factor's relative contribution while its AUC falls

Domain: data · Evidence E1 — Maintainer reviewed

metricsaucnormalizationattributionsensitivity-analysisinterpretation

Summary

在相对贡献分解（log-AUC 增量法）里，新增一个弱信号样本后，某因素的**绝对 AUC 明显下降**，但它的**相对贡献占比反而上升**。

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