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An Empirical Assessment of Endogeneity Issues In Demand Analysis for Differentiated Products

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  • Tirtha Pratim Dhar
  • Jean-Paul Chavas
  • Brian W. Gould

Abstract

This article explores the issue of price and expenditure endogeneity in empirical demand analysis. The analysis focuses on the US carbonated soft drink market. We test the null hypothesis that price and expenditures are exogenous in the demand for carbonated soft drinks. Using an Almost Ideal Demand System (AIDS) specification, we strongly reject exogeneity for both prices and expenditures. We find that accounting for price/expenditures endogeneity significantly impacts demand elasticity estimates. We also evaluate the implications of endogeneity issues for testing weak separability.

Suggested Citation

  • Tirtha Pratim Dhar & Jean-Paul Chavas & Brian W. Gould, 2002. "An Empirical Assessment of Endogeneity Issues In Demand Analysis for Differentiated Products," Food Marketing Policy Center Research Reports 066, University of Connecticut, Department of Agricultural and Resource Economics, Charles J. Zwick Center for Food and Resource Policy.
    • Handle: RePEc:zwi:fpcrep:066
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