About concordance square indexes among deviations: correlation indexes

Abstract

This work is strictly connected to the same authors', appeared in the 4th issue of "STATISTICA", 1984. Following Gini's conception, that divides the concordance indexes into homophile indexes and correlation indexes, accordingly we should make a reference to the relative maximum knowledge or to the concordance absolute maximum one, we have discussed on these pages about a general theory of the correlation square indexes among deviations, and so meaning that indexes having logical structure of partial correlation indexes have been introduced. It goes without saying that in the context the simple correlation square index among deviations proposed by Gini occurs again.