The Gini index does not give a strictly consistent scoring rule in general. Therefore, maximizing the Gini index may lead to wrong decisions. The main issue is that the Gini index is a rank-based score that is not calibration-sensitive. We show that the Gini index allows for strictly consistent scoring if we restrict to the class of auto-calibrated regression models.
翻译:吉尼指数并没有给出一个严格一致的评分规则。 因此,尽可能扩大吉尼指数可能导致错误的决定。 主要问题是吉尼指数是基于等级的得分,对校准不敏感。 我们显示,如果我们限制自动校准回归模型,吉尼指数允许严格一致的评分。