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Introducing Melitz-Style Firm Heterogeneity in CGE Models: Technical Aspects and Implications

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  • Roson, Roberto
  • Oyamada, Kazuhiko

Abstract

This paper discusses which changes in the architecture of a standard CGE model are needed in order to introduce effects of trade and firm heterogeneity à la Melitz. Starting from a simple specification with partial equilibrium, one primary production factor and one industry, the framework is progressively enriched by including multiple factors, intermediate inputs, multiple industries (with a mixture of differentiated and nondifferentiated products), and a real general equilibrium closure. Therefore, the model structure is gradually made similar to a full-fledged CGE. Calibration techniques are discussed, and a number of changes from the original Melitz’s assumptions are also proposed. It is argued that the inclusion of industries with heterogeneous firms in a CGE framework does not simply make the Melitz model “operational”, but allows accounting for structural effects that may significantly affect the nature, meaning and implications of the model results.

Suggested Citation

  • Roson, Roberto & Oyamada, Kazuhiko, 2014. "Introducing Melitz-Style Firm Heterogeneity in CGE Models: Technical Aspects and Implications," Conference papers 332433, Purdue University, Center for Global Trade Analysis, Global Trade Analysis Project.
    • Handle: RePEc:ags:pugtwp:332433
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    References listed on IDEAS

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    1. Balistreri, Edward J. & Hillberry, Russell H. & Rutherford, Thomas F., 2011. "Structural estimation and solution of international trade models with heterogeneous firms," Journal of International Economics, Elsevier, vol. 83(2), pages 95-108, March.
    2. J. M. C. Santos Silva & Silvana Tenreyro, 2015. "Trading Partners and Trading Volumes: Implementing the Helpman–Melitz–Rubinstein Model Empirically," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 77(1), pages 93-105, February.
    3. Balistreri, Edward J. & Rutherford, Thomas F., 2013. "Computing General Equilibrium Theories of Monopolistic Competition and Heterogeneous Firms," Handbook of Computable General Equilibrium Modeling, in: Peter B. Dixon & Dale Jorgenson (ed.), Handbook of Computable General Equilibrium Modeling, edition 1, volume 1, chapter 0, pages 1513-1570, Elsevier.
    4. Andrew B. Bernard & Stephen J. Redding & Peter K. Schott, 2007. "Comparative Advantage and Heterogeneous Firms," Review of Economic Studies, Oxford University Press, vol. 74(1), pages 31-66.
    5. Roberto Roson, 2006. "Introducing Imperfect Competition in CGE Models: Technical Aspects and Implications," Computational Economics, Springer;Society for Computational Economics, vol. 28(1), pages 29-49, August.
    6. Marc J. Melitz, 2003. "The Impact of Trade on Intra-Industry Reallocations and Aggregate Industry Productivity," Econometrica, Econometric Society, vol. 71(6), pages 1695-1725, November.
    7. Zhai, Fan, 2008. "Armington Meets Melitz: Introducing Firm Heterogeneity in a Global CGE Model of Trade," Journal of Economic Integration, Center for Economic Integration, Sejong University, vol. 23, pages 575-604.
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