CGEBox: A Flexible, Modular and Extendable Framework for CGE Analysis in GAMS

IF 2.2 Q2 ECONOMICS
W. Britz, D. Mensbrugghe
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引用次数: 40

Abstract

We present CGEBox, an open-source and open-access framework for regional and global Computable General Equilibrium analysis realized in the General Algebraic Modeling System (GAMS) software. It flexibly depicts different nestings in production and factor supply, supports different functional forms for demand and choices in modeling international trade sectors (Armington, Armington plus Constant Elasticity of Transformation to distribute supply, Melitz and Krugman model). Either a regional household approach or separate accounts for government and potentially multiple private households with related closures are available. Supply and factor markets can be dis-aggregated to sub-regions and an implementation for GTAP-AEZ is available. We compare the layout of different well-known global and single country CGE models and discuss to what extent our flexible framework can replicate these layouts. In a structural sensitivity analysis, we compare major results under multi-lateral trade liberalization and endowment changes in one country for different model configurations. These reflect important structural differences between the chosen examples as well as additional features such as the Melitz model or endogenous capital stocks driven by investments in a comparative-static setting. We find relative limited differences in global and regional welfare between models based on the Armington assumption, even if other features differ such as closures, nestings or functional form in demand. A discussion on further joint development of such a framework leads to our summary and conclusions.
CGEBox: GAMS中用于CGE分析的灵活、模块化和可扩展框架
我们介绍了CGEBox,这是一个用于区域和全球可计算一般均衡分析的开源开放访问框架,在通用代数建模系统(GAMS)软件中实现。它灵活地描绘了生产和要素供应中的不同嵌套,支持国际贸易部门建模中需求和选择的不同功能形式(Armington、Armington加上分配供应的恒定弹性转换、Melitz和Krugman模型)。可以采用区域家庭法,也可以为政府和可能有多个相关关闭的私人家庭提供单独的账户。供应和要素市场可以分解为子区域,并且可以实施GTAP-AEZ。我们比较了不同知名的全球和单个国家CGE模型的布局,并讨论了我们的灵活框架可以在多大程度上复制这些布局。在结构敏感性分析中,我们比较了不同模式配置下一个国家在多边贸易自由化和禀赋变化下的主要结果。这些反映了所选例子之间的重要结构差异,以及其他特征,如Melitz模型或由相对静态环境中的投资驱动的内生资本存量。我们发现,基于Armington假设的模型在全球和地区福利方面的差异相对有限,即使其他特征不同,如封闭、嵌套或需求的功能形式。关于进一步共同制定这样一个框架的讨论导致了我们的总结和结论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
5.60
自引率
12.00%
发文量
0
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