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Introduction to Computational Economywide Modeling with GAMS

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  • Mercado, Ruben
  • Kendrick, David

Abstract

The analysis of economywide models is a particularly demanding topic in economics since it involves the study of interdependence. It implies a move to the realm of multiple heterogeneous agents, sectors and institutions interacting in complex ways. While there are some analytical methods and results available to help us in such endeavor, computational methods become necessary when we move to medium to large size models or when we have to deal with particularly complex ones. Our goal here is to provide a basic introduction to the art of economy-wide modeling. We present a sequence of small models, we show how to implement them in the General Algebraic Modeling System (GAMS) and we perform and suggests some experiments. We start with an Input-Output model in which quantities produced are determined given technology and demand levels, we follow with a Production Prices model which determines relative prices given technology and a distributive variable, and then we move to a General Equilibrium model in which prices and quantities are determined simultaneously given technology, preferences and endowments. Finally, we introduce SAM based and Johansen style Computable General Equilibrium models.

Suggested Citation

  • Mercado, Ruben & Kendrick, David, 2002. "Introduction to Computational Economywide Modeling with GAMS," MPRA Paper 111973, University Library of Munich, Germany.
    • Handle: RePEc:pra:mprapa:111973
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    References listed on IDEAS

    as
    1. Zenios, Stavros A., 1996. "Modeling languages in computational economics: Gams," Handbook of Computational Economics, in: H. M. Amman & D. A. Kendrick & J. Rust (ed.), Handbook of Computational Economics, edition 1, volume 1, chapter 10, pages 471-488, Elsevier.
    2. Dixon, Peter B. & Parmenter, B.R., 1996. "Computable general equilibrium modelling for policy analysis and forecasting," Handbook of Computational Economics, in: H. M. Amman & D. A. Kendrick & J. Rust (ed.), Handbook of Computational Economics, edition 1, volume 1, chapter 1, pages 3-85, Elsevier.
    3. P. Ruben Mercado & David A. Kendrick, 1997. "HTGAMS: Hall and Taylor's Model in GAMS," CARE Working Papers 9704, The University of Texas at Austin, Center for Applied Research in Economics.
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    More about this item

    Keywords

    Economywide Models - Input Output Models - Production Prices Models - Computable General Equilibrium Models;

    JEL classification:

    • C63 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computational Techniques
    • C67 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Input-Output Models
    • C68 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computable General Equilibrium Models

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