On constant elasticities of demand

Andrés Vázquez
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Andrés Vázquez: Consejo Superior de Investigaciones Científicas

Estudios Económicos, 1998, vol. 13, issue 1, 73-79

Abstract: While the Slutsky matrix and duality theory have been used to establish that constant elasticity demand functions imply unitary income elasticities, zero cross price elasticities and own price elasticities equal to minus one, this note shows that these results can also be straightforwardly derived from the simple assumption that demand functions satisfy the budget constraint with strict equality.

Date: 1998
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