Abul Naga, R.H. & Geoffard, P-Y (2006). Decomposition of bivariate inequality indices by attributes. Economics Letters, 90(3), 362-367.
ABSTRACT
We provide, for the class of relative bidimensional inequality indices, a decomposition of inequality into two univariate Atkinson–Kolm–Sen indices and a third statistic which depends on the joint distribution of resources.