In this paper, we propose the conception of Within-group Consumption-Dominance Curves in order to capture the impact of indirect tax reforms on poverty. Considering that the population is partitioned into many groups, which differ in needs, in health, in capability or other attributes, we...

Income inequality measures involve two sub-classes of decomposable measures: those decomposed by sub-groups and those decomposed by income source. The former enables one to compute between- and within-group indices. The latter allows for gauging the inequality related to each factor of income...

The purpose of this paper is to show that the Gini index of equality is: (i) subgroup decomposable throughout interpersonal comparisons; (ii) decomposable by income source; (iii) decomposable both by subgroup and income source; (iv) and decomposable in a multidimensional context permitting...

The concept of efficiency in groups postulates that a coalition of firms has to record a smaller distance toward the aggregate technology frontier compared with the sum of individual distances. Efficiency analysis (either allocative or technical) is defined with respect to cooperative firm game...

Data contamination and excessive correlations between regressors (multicollinearity) constitute a standard and major problem in econometrics. Two techniques enable solving these problems, in separate ways: the Gini regression for the former, and the PLS (partial least squares) regression for the...

L’économie des inégalités est une partie non négligeable de l’économie publique et du domaine de la justice sociale. Pour apprécier l’efficacité d’un principe de justice sociale (commutative, distributive, locale, etc.), les mesures d’inégalité sont souvent utilisées. Elles...

[eng] The inequalities of net annual wages, estimated via the Gini ratio, declined by about 8 % between 1976 and 2000. The indicator fell from 0.322 to 0.296. By using the Gini decomposition and dividing the French population by age group, gender, occupational category, and geographic area, we...

We propose a generalization of the decomposition by population subgroups of the α-Gini index, the so-called multi-level subgroup decomposition. We demonstrate that all components obtained from the decomposition, can integrate in their functional form a parameter of inequality sensitivity being...