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A Dispersed Equilibrium Commodity Trade Model

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  • Roy, John R

Abstract

For many bulk commodities, such as mineral ores, crude oil, building materials and food grains, the suppliers are increasingly in the position of being price-takers. This means that, in the short run, their main decisions relate to spatial choice of markets and setting of production levels within the currently available capacity. In this paper, an entropy maximization framework is introduced to handle dispersion about the profit-maximizing choice of markets and production levels by the suppliers. The model also uses information theory to implicitly account for certain rigidities in trading relationships resulting from non-price factors. Although demand functions must be provided exogenously, cost functions can be inferred from regional vintage production data, which in turn allow profit functions to be defined for each producing region or country. A unique and stable dispersed price equilibrium of the Walrasian type is established for this spatial system under quite general conditions.

Suggested Citation

  • Roy, John R, 1990. "A Dispersed Equilibrium Commodity Trade Model," The Annals of Regional Science, Springer;Western Regional Science Association, vol. 24(1), pages 13-28.
    • Handle: RePEc:spr:anresc:v:24:y:1990:i:1:p:13-28
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    Cited by:

    1. José Holguín-Veras & Ning Xu & Miguel Jaller & John Mitchell, 2016. "A Dynamic Spatial Price Equilibrium Model of Integrated Urban Production-Transportation Operations Considering Freight Delivery Tours," Transportation Science, INFORMS, vol. 50(2), pages 489-519, May.

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