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Trade Coefficients and the Role of Elasticity in a Spatial CGE Model Based on the Armington Assumption

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Listed:
  • Ando, Asao
  • Meng, Bo
  • Chao, Qu

Abstract

The Armington Assumption in the context of multi-regional CGE models is commonlyinterpreted as follows: Same commodities with different origins are imperfect substitutes for eachother. In this paper, a static spatial CGE model that is compatible with this assumption andexplicitly considers the transport sector and regional price differentials is formulated. Tradecoefficients, which are derived endogenously from the optimization behaviors of firms andhouseholds, are shown to take the form of a potential function. To investigate how the elasticityof substitutions affects equilibrium solutions, a simpler version of the model that incorporatesthree regions and two sectors (besides the transport sector) is introduced. Results indicate: (1) ifcommodities produced in different regions are perfect substitutes, regional economies will beeither autarkic or completely symmetric and (2) if they are imperfect substitutes, the impact ofelasticity on the price equilibrium system as well as trade coefficients will be nonlinear andsometimes very sensitive.

Suggested Citation

  • Ando, Asao & Meng, Bo & Chao, Qu, 2009. "Trade Coefficients and the Role of Elasticity in a Spatial CGE Model Based on the Armington Assumption," IDE Discussion Papers 204, Institute of Developing Economies, Japan External Trade Organization(JETRO).
    • Handle: RePEc:jet:dpaper:dpaper204
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    References listed on IDEAS

    as
    1. Asao Ando & Bo Meng, 2009. "The Transport Sector And Regional Price Differentials: A Spatial Cge Model For Chinese Provinces," Economic Systems Research, Taylor & Francis Journals, vol. 21(2), pages 89-113.
    2. Paul A. Samuelson, 1953. "Prices of Factors and Goods in General Equilibrium," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 21(1), pages 1-20.
    3. Philip McCann, 2005. "Transport costs and new economic geography," Journal of Economic Geography, Oxford University Press, vol. 5(3), pages 305-318, June.
    4. Meng, Bo & Ando, Asao, 2005. "An Economic Derivation on Trade Coefficients under the Framework of Multi-regional I-O Analysis," IDE Discussion Papers 29, Institute of Developing Economies, Japan External Trade Organization(JETRO).
    5. Plassmann, Florenz, 2005. "The advantage of avoiding the Armington assumption in multi-region models," Regional Science and Urban Economics, Elsevier, vol. 35(6), pages 777-794, November.
    6. Brander, James A., 1981. "Intra-industry trade in identical commodities," Journal of International Economics, Elsevier, vol. 11(1), pages 1-14, February.
    7. Lofgren, Hans & Robinson, Sheman, 2002. "Spatial-network, general-equilibrium model with a stylized application," Regional Science and Urban Economics, Elsevier, vol. 32(5), pages 651-671, September.
    Full references (including those not matched with items on IDEAS)

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    More about this item

    Keywords

    Armington Assumption; Spatial CGE; Elasticity of substitution; Trade coefficient; Econometric model;
    All these keywords.

    JEL classification:

    • C68 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computable General Equilibrium Models
    • R13 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General Regional Economics - - - General Equilibrium and Welfare Economic Analysis of Regional Economies
    • R15 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General Regional Economics - - - Econometric and Input-Output Models; Other Methods

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