Estimação do sistema quase ideal de demanda para uma cesta ampliada de produtos empregando dados da POF de 2002-2003

Abstract

This paper aimed to estimate price-elasticities, cross-elasticities and expenditure-elasticities for 27 groups of products in Brazil. Brazilian Household Budgets Research (POF) 2002-2003 microdata were used on the estimations of non-linear almost ideal demand systems (NL-AIDS). The parameters used in the NL-AIDS were previously estimated using iterated seemingly unrelated regressions (ITSUR). Most of the estimations showed that price-elasticities for food products are lower than one. On the other hand, non-food products did not show high price-elasticities. Expenditure-elasticities were in accordance with previous assumptions.