François Gardes (CERMSEM - CEntre de Recherche en Mathématiques, Statistique et Économie Mathématique - CNRS : UMR8095 - Université Panthéon-Sorbonne - Paris I) Greg Duncan (Northwestern U. - Northwestern University) Patrice Gaubert () (SAMOS - Statistique Appliquée et MOdélisation Stochastique - Université Panthéon-Sorbonne - Paris I) Marc Gurgand (DELTA - Département et Laboratoire d'Economie Théorique et Appliquée - CNRS : UMR8545 - Ecole Normale Supérieure de Paris - ENS Paris) Christophe Starzec (TEAM - Théories et Applications en Microéconomie et Macroéconomie - CNRS : UMR8059 - Université Panthéon-Sorbonne - Paris I)
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The problem addressed in this article is the bias to income and expenditure elasticities estimated on pseudo-panel data caused by measurement error and unobserved heterogeneity. We gauge empirically these biases by comparing cross-sectional, pseudo-panel and true panel data from both Polish and American expenditure surveys. Our results suggest that unobserved heterogeneity imparts a downward bias to cross-section estimates of income elasticities of at-home food expenditures and an upward bias to estimates of income elasticities of away-from-home food expenditures. "Within" and first-difference estimators suffer less bias, but only if the effects of measurement error are accounted for with instrumental variables.
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Length: Date of creation: Apr 2005 Date of revision: Publication status: Published, Journal of Business & Economic Statistics, 2005, 23, 2, 242-253 Handle: RePEc:hal:cesptp:hal-00176109_v1
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