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Import Demand Estimation and the Generalized Composite Commodity Theorem

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  • Asche, Frank
  • Guttormsen, Atle G.
  • Kristofersson, Dadi
  • Roheim, Cathy A.

Abstract

A frequently encountered problem in import demand estimation is how to account for competition between imports and domestic production. Traditionally, use of the Armington model has been a way to handle this problem. This is a disaggregate model which distinguishes commodities by country of origin with import demand determined in a separable two-step procedure. The model appears frequently in analysis of international agricultural markets. However, the Armington model relies on a set of weak separability assumptions, which several authors have shown to be highly questionable. In this paper, a new aggregation theorem, the Generalized Composite Commodity Theorem (GCCT), is applied to test whether imports can be treated as a separate group. An advantage with the GCCT is that only import data is required to conduct the test. The application is to the imports of swordfish to the U.S. with implications for U.S. and international swordfish management policies.

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Bibliographic Info

Paper provided by American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association) in its series 2005 Annual meeting, July 24-27, Providence, RI with number 19432.

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Date of creation: 2005
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Handle: RePEc:ags:aaea05:19432

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Related research

Keywords: Armington; separability; GCCT; demand system; sword fish; International Relations/Trade; F18; Q11; Q22;

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References

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  1. Asche, F. & Bremnes, H. & Wessells, C.R., 1998. "Product Aggregation, Market Integration and Relationships Between Prices: an Application to World Salmon Markets," Papers 27/98, Norwegian School of Economics and Business Administration-.
  2. Kjell G. Salvanes, 1997. "Market Delineation and Demand Structure," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 79(1), pages 139-150.
  3. Kapuscinski, Cezary A. & Warr, Peter G., 1999. "Estimation of Armington elasticities: an application to the Philippines," Economic Modelling, Elsevier, vol. 16(2), pages 257-278, April.
  4. Adolf Buse & Wing H Chan, 2000. "Invariance, price indices and estimation in almost ideal demand systems," Empirical Economics, Springer, vol. 25(3), pages 519-539.
  5. Lewbel, Arthur, 1996. "Aggregation without Separability: A Generalized Composite Commodity Theorem," American Economic Review, American Economic Association, vol. 86(3), pages 524-43, June.
  6. Deaton, Angus S & Muellbauer, John, 1980. "An Almost Ideal Demand System," American Economic Review, American Economic Association, vol. 70(3), pages 312-26, June.
  7. Moschini, GianCarlo, 1995. "Units of Measurement and the 'Stone Index' In Demand System Estimation," Staff General Research Papers 5058, Iowa State University, Department of Economics.
  8. Pashardes, Panos, 1993. "Bias in Estimating the Almost Ideal Demand System with the Stone Index Approximation," Economic Journal, Royal Economic Society, vol. 103(419), pages 908-15, July.
  9. Doane, Michael J & Spulber, Daniel F, 1994. "Open Access and the Evolution of the U.S. Spot Market for Natural Gas," Journal of Law and Economics, University of Chicago Press, vol. 37(2), pages 477-517, October.
  10. George C. Davis & Ni Lin & C. Richard Shumway, 2000. "Aggregation without Separability: Tests of the United States and Mexican Agricultural Production Data," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 82(1), pages 214-230.
  11. Chalfant, James A, 1987. "A Globally Flexible, Almost Ideal Demand System," Journal of Business & Economic Statistics, American Statistical Association, vol. 5(2), pages 233-42, April.
  12. Albert J. Reed & J. William Levedahl & Charles Hallahan, 2005. "The Generalized Composite Commodity Theorem and Food Demand Estimation," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 87(1), pages 28-37.
  13. Karagiannis, G. & Mergos, G. J., 2002. "Estimating theoretically consistent demand systems using cointegration techniques with application to Greek food data," Economics Letters, Elsevier, vol. 74(2), pages 137-143, January.
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Cited by:
  1. Wang, Xiaojin & Reed, Michael, 2013. "Estimation of Import Demand for Fishery Products in the U.S. Using the Source-Differentiated AIDS Model," 2013 Annual Meeting, August 4-6, 2013, Washington, D.C. 150207, Agricultural and Applied Economics Association.

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