Nous etudions des familles de distributions bivariees du revenu et de l'age, mais aussi du statut professionnel par l'intermediaire de leurs densites marginales et conditionnelles sur plusieurs annees. Un concept d'invariance est introduit afin de decrire l'evolution dans le temps de ces...

The goal of this paper is to model the mean (aggregate) consumption expenditure of a large and heterogeneous population of households. The aggregation process is based on assumptions of how the income distribution and the composition of the population evolves over time (structural stability). It...

The pupose of the present paper is to examine the metonymy hypothesis in more detail. We prove that the distribution of demand vectors derived from a not necessarily metonymic population is identical to the distribution derived from some metonymic one.