Gini index decomposition for the case of two subgroups

Michele Costa
Gini inequality index decomposition into within and between inequality components arises since a long time a controversial, wide and interesting discussion. The measurement of inequality between is traditionally obtained in the framework of analysis of variance as a function of only the means of the subgroups. An alternative methodology to measure inequality between states the possibility to take into account all differences between subgroups distributions. By referring to this new approach, the paper introduces a...