Lorentzen, Christian; Mayer, Michael; Wuthrich, Mario V. - 2022
In the machine learning community, the Gini index is a very popular score for model selection, and it is also used in … actuarial science for evaluating insurance pricing models. The purpose of this tutorial is to discuss the Gini index, both its … classification problems. A main deficiency of the Gini index is that it does not give us a consistent scoring function. Therefore …