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A standard computable general equilibrium (CGE) model in GAMS

  • Löfgren, Hans
  • Harris, Rebecca Lee
  • Robinson, Sherman

Computable general equilibrium (CGE) models are used widely in policy analysis. The purpose of this paper is to contribute to and facilitate the use of CGE models. The paper includes a detailed presentation of a “standard” CGE model (an equation-by-equation description) and its required database. It incorporates features developed in recent years in research projects conducted at IFPRI. These features, which are of particular importance in developing countries, include household consumption of non-marketed (or “home”) commodities, explicit treatment of transaction costs for commodities that enter the market sphere, and a separation between producing activities and commodities that permits any activity to produce multiple commodities and any commodity to be produced by multiple activities. The paper discusses the implementation of the model in GAMS (the General Algebraic Modeling System) and is accompanied by a self-extracting zip file, which includes the GAMS files for the model, sample databases, simulations, solution reports, and a SAM aggregation program. Although the paper provides a standardized framework for analysis, the analyst is not forced to make “one-size-fits-all” assumptions. The GAMS code is written in a manner that gives the analyst considerable flexibility in model specification.

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Paper provided by International Food Policy Research Institute (IFPRI) in its series TMD discussion papers with number 75.

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Date of creation: 2001
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Handle: RePEc:fpr:tmddps:75
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  1. Robinson, Sherman, 1989. "Multisectoral models," Handbook of Development Economics, in: Hollis Chenery & T.N. Srinivasan (ed.), Handbook of Development Economics, edition 1, volume 2, chapter 18, pages 885-947 Elsevier.
  2. Robinson, Sherman, 1991. "Macroeconomics, financial variables, and computable general equilibrium models," World Development, Elsevier, vol. 19(11), pages 1509-1525, November.
  3. repec:cup:cbooks:9780521266550 is not listed on IDEAS
  4. Victor Ginsburgh & Michiel Keyzer, 2002. "The Structure of Applied General Equilibrium Models," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262571579, August.
  5. Robinson, Sherman & Roland-Holst, David W., 1988. "Macroeconomic structure and computable general equilibrium models," Journal of Policy Modeling, Elsevier, vol. 10(3), pages 353-375.
  6. Rattso, Jorn, 1982. "Different macroclosures of the original Johansen model and their impact on policy evaluation," Journal of Policy Modeling, Elsevier, vol. 4(1), pages 85-97, March.
  7. Robinson, Sherman & El-Said, Moataz, 2000. "GAMS code for estimating a social accounting matrix (SAM) using cross entropy methods (CE)," TMD discussion papers 64, International Food Policy Research Institute (IFPRI).
  8. Devarajan, Shantayanan & Lewis, Jeffrey D & Robinson, Sherman, 1993. "External Shocks, Purchasing Power Parity, and the Equilibrium Real Exchange Rate," World Bank Economic Review, World Bank Group, vol. 7(1), pages 45-63, January.
  9. Pyatt, Graham, 1988. "A SAM approach to modeling," Journal of Policy Modeling, Elsevier, vol. 10(3), pages 327-352.
  10. Robinson, Sherman & Yunez-Naude, Antonio & Hinojosa-Ojeda, Raul & Lewis, Jeffrey D. & Devarajan, Shantayanan, 1999. "From stylized to applied models:: Building multisector CGE models for policy analysis," The North American Journal of Economics and Finance, Elsevier, vol. 10(1), pages 5-38.
  11. Robinson, Sherman & Cattaneo, Andrea & El-Said, Moataz, 2000. "Updating and estimating a Social Accounting Matrix using cross entropy methods," TMD discussion papers 58, International Food Policy Research Institute (IFPRI).
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