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Short-run and long-run marginal costs of joint products in linear programming

Axel Pierru () and Denis Babusiaux
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Denis Babusiaux: IFPEN - IFP Energies nouvelles - IFPEN - IFP Energies nouvelles

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Abstract: In standard microeconomic theory, short-run and long-run marginal costs are equal for production equipment with adjusted capacity. When the production of joint products from interdependent equipment is modeled with a linear program, as in oil refining, this equality is no longer verified. The short-run marginal cost then takes on a left-hand value and a right-hand value which generally differ from the long-run marginal cost. In this article, we demonstrate and interpret the relationship existing between long-run marginal cost and short-run marginal costs for a given finished product. That relationship is simply expressed as a function of marginal capacity adjustments (determined in the long run) and marginal values of capacities (determined in the short run).

Date: 2008-06
Note: View the original document on HAL open archive server: https://hal-ifp.archives-ouvertes.fr/hal-02469431
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Journal Article: Short-run and long-run marginal costs of joint products in linear programming (2007) Downloads
Working Paper: Short-run and long-run marginal costs of joint products in linear programming (2007) Downloads
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