Consumer-related policy decisions often require analysis of aggregate responses or mean elasticities. However, in practice these mean elasticities are seldom used. Mean elasticities can be approximated using aggregate data, but that introduces aggregation bias for full and compensated price...

In "The Economics of Imperfect Competition", Joan Robinson argued that an increase of the consumers' incomes should make demand less elastic - which, although reasonable about individual demand as an assumption on preferences, suggests a role for income distribution as far as market demand is...

We analyze the effects of income concentration and income dispersion on market demand and its elasticity. We show that, following an increase in income concentration towards the middle (measured by variations in mean preservingspread), the increase in demand faced by firms which serve at the...