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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.

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File URL: http://fmpc.uconn.edu/publications/rr/rr66.pdf
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Bibliographic Info

Paper provided by University of Connecticut, Department of Agricultural and Resource Economics, Charles J. Zwick Center for Food and Resource Policy in its series Food Marketing Policy Center Research Reports with number 066.

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Date of creation: 2002
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Handle: RePEc:zwi:fpcrep:066

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Postal: 1376 Storrs Road, U-21, Storrs, Connecticut 06269-4021
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Fax: 860-486-1932
Web page: http://www.zwickcenter.uconn.edu
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Keywords: endogeneity; separability; carbonated soft drinks; Almost Ideal Demand System; Demand and Price Analysis;

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  1. Nevo, Aviv, 2001. "Measuring Market Power in the Ready-to-Eat Cereal Industry," Econometrica, Econometric Society, vol. 69(2), pages 307-42, March.
  2. J. A. Hausman, 1976. "Specification Tests in Econometrics," Working papers 185, Massachusetts Institute of Technology (MIT), Department of Economics.
  3. Moschini, GianCarlo & Moro, D. & Green, Richard D., 1994. "Maintaining and Testing Separability in Demand Systems," Staff General Research Papers 11247, Iowa State University, Department of Economics.
  4. Cotterill, Ronald W. & Franklin, Andrew W. & Ma, Li Yu, 1996. "Measuring Market Power Effects in Differentiated Product Industries: An Application to the Soft Drink Industry," Research Reports 25229, University of Connecticut, Food Marketing Policy Center.
  5. Italianer, Alexander, 1985. "A small-sample correction for the likelihood ratio test," Economics Letters, Elsevier, vol. 19(4), pages 315-317.
  6. Mario F. Teisl & Nancy E. Bockstael & Alan Levy, 2001. "Measuring the Welfare Effects of Nutrition Information," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 83(1), pages 133-149.
  7. Kadiyali, Vrinda & Vilcassim, Naufel J & Chintagunta, Pradeep K, 1996. "Empirical Analysis of Competitive Product Line Pricing Decisions: Lead, Follow, or Move Together?," The Journal of Business, University of Chicago Press, vol. 69(4), pages 459-87, October.
  8. Blackorby, C. & Davidson, R. & Schworm, W., 1990. "Implicit Separability: Characterisation And Implications For Consumer Demands," G.R.E.Q.A.M. 90a16, Universite Aix-Marseille III.
  9. Ronald W. Cotterill & Andrew W. Franklin & Li Yu Ma, 1996. "Measuring Market Power Effects in Differentiated Product Industries: An Application to the Soft Drink Industry," Food Marketing Policy Center Research Reports 032, University of Connecticut, Department of Agricultural and Resource Economics, Charles J. Zwick Center for Food and Resource Policy.
  10. Blundell & Robin, 2000. "Latent separability : grouping goods without weak separability," Working Papers 156158, Institut National de la Recherche Agronomique, France.
  11. Cotterill, Ronald W & Putsis, William P, Jr & Dhar, Ravi, 2000. "Assessing the Competitive Interaction between Private Labels and National Brands," The Journal of Business, University of Chicago Press, vol. 73(1), pages 109-37, January.
  12. Jeffrey T. LaFrance, 1993. "Weak Separability in Applied Welfare Analysis," Development Research Unit Working Paper Series archive-26, Monash University, Department of Economics.
  13. Pudney, Stephen E, 1981. "An Empirical Method of Approximating the Separable Structure of Consumer Preferences," Review of Economic Studies, Wiley Blackwell, vol. 48(4), pages 561-77, October.
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Cited by:
  1. Francesco Torrisi & Gianluca Stefani & Chiara Seghieri, 2006. "Use of scanner data to analyze the table wine demand in the Italian major retailing trade," Agribusiness, John Wiley & Sons, Ltd., vol. 22(3), pages 391-403.
  2. Pan, Suwen & Jensen, Helen H., 2008. "Does the Food Stamp Program Affect Food Security Status and the Composition of Food Expenditures?," Staff General Research Papers 12896, Iowa State University, Department of Economics.
  3. Susanto, Dwi & Rosson, C. Parr, III & Henneberry, Shida Rastegari, 2008. "The Structure of U.S. Red Meat and Livestock Imports," 2008 Annual Meeting, February 2-6, 2008, Dallas, Texas 6824, Southern Agricultural Economics Association.
  4. Wang, Shinn-Shyr & Stiegert, Kyle W. & Dhar, Tirtha P., 2006. "Strategic Pricing Behavior under Asset Value Maximization," Staff Paper Series 495, University of Wisconsin, Agricultural and Applied Economics.
  5. Muhammad, Andrew, 2008. "The Role of the Imports for Re-Exports Program in Determining Canadian Demand for Imported Cheese: Implications for U.S. Exports," 2008 Annual Meeting, February 2-6, 2008, Dallas, Texas 8214, Southern Agricultural Economics Association.
  6. Du, Ying & Stiegert, Kyle W., 2009. "Strategic Vertical Pricing in the U.S. Butter Market," 2009 Annual Meeting, July 26-28, 2009, Milwaukee, Wisconsin 51712, Agricultural and Applied Economics Association.
  7. Dhar, Tirtha Pratim & Foltz, Jeremy D., 2003. "Market Structure And Consumer Valuation In The Rbst-Free And Organic Milk Markets," 2003 Annual meeting, July 27-30, Montreal, Canada 22177, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
  8. Dhar, Tirtha Pratim & Foltz, Jeremy D., 2004. "Is Soy Milk? The Economics Of The Soy Milk Market," 2004 Annual meeting, August 1-4, Denver, CO 20337, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
  9. Pan, Suwen & Mohanty, Samarendu & Welch, Mark, 2008. "India Edible Oil Consumption: A Censored Incomplete Demand Approach," Journal of Agricultural and Applied Economics, Southern Agricultural Economics Association, vol. 40(03), December.
  10. Bopape, Lesiba, 2006. "Heterogeneity of Household Food Expenditure Patterns in South Africa," 2006 Annual meeting, July 23-26, Long Beach, CA 21300, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).

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