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Introducing Imperfect Competition in CGE Models: Technical Aspects and Implications

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  • Roberto Roson

Abstract

This paper considers the technical aspects and the consequences, in terms of simulation results and policy assessment, of introducing imperfect competition in a CGE model. The modifications to the standard CGE framework needed to model imperfect competition in some industries are briefly discussed. Next, the paper discusses whether, how much and why, those changes may affect the qualitative output of a typical simulation experiment. It is argued that technical choices made in designing the model structure may have a significant impact on the model behavior. This is especially evident when the output of the model, under an imperfect competition closure, is compared with that obtained under a standard closure, assuming perfect competition. As an illustration, a scenario of agricultural trade liberalization under alternative market structures is analyzed.
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  • 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.
    • Handle: RePEc:kap:compec:v:28:y:2006:i:1:p:29-49
    DOI: 10.1007/s10614-006-9034-6
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    Cited by:

    1. Gentile, Elisabetta & Li, Gen & Mariasingham, Mahinthan Joseph, 2020. "Assessing the impact of the US-PRC trade dispute using a multiregional CGE model," Conference papers 333144, Purdue University, Center for Global Trade Analysis, Global Trade Analysis Project.
    2. De Souza Ferreira Filho, Joaquim Bento, 1999. "Trade Creation X Trade Diversion: Evidences from the GTAP Model in the Mercosur Integration Process," Conference papers 330889, Purdue University, Center for Global Trade Analysis, Global Trade Analysis Project.
    3. Soregaroli, Claudio & Sckokai, Paolo & Moro, Daniele, 2011. "Agricultural policy modelling under imperfect competition," Journal of Policy Modeling, Elsevier, vol. 33(2), pages 195-212, March.
    4. City Eldeep & Chahir Zaki, 2023. "On the unfinished business of stabilization programs: a CGE model of Egypt," Middle East Development Journal, Taylor & Francis Journals, vol. 15(1), pages 66-100, January.
    5. Oyamada, Kazuhiko, 2014. "Behavioral Characteristics of Applied General Equilibrium Models with an Armington-Krugman-Melitz Encompassing Module," Conference papers 332442, Purdue University, Center for Global Trade Analysis, Global Trade Analysis Project.
    6. Wolfgang Britz & Roberto Roson, 2018. "Exploring Long Run Structural Change with a Dynamic General Equilibrium Model," Working Papers 2018: 12, Department of Economics, University of Venice "Ca' Foscari".
    7. Ciuriak, Dan & Dadkhah, Ali & Xiao, Charles, 2019. "Quantifying the USMCA," Conference papers 333073, Purdue University, Center for Global Trade Analysis, Global Trade Analysis Project.
    8. Davood Askarany & Mona Parsaei & Nilofar Ghanbari, 2024. "Business Strategy, Short-Term Debt, and Cost Stickiness," Computational Economics, Springer;Society for Computational Economics, vol. 64(3), pages 1913-1936, September.
    9. Oyamada, Kazuhiko, 2013. "Parameterization of applied general equilibrium models with flexible trade specifications based on the Armington, Krugman, and Melitz models," IDE Discussion Papers 380, Institute of Developing Economies, Japan External Trade Organization(JETRO).
    10. Meyer, Bernd & Ahlert, Gerd, 2019. "Imperfect Markets and the Properties of Macro-economic-environmental Models as Tools for Policy Evaluation," Ecological Economics, Elsevier, vol. 155(C), pages 80-87.
    11. Roberto Roson & Kazuhiko Oyamada, 2014. "Introducing Melitz-Style Firm Heterogeneity in CGE Models: Technical Aspects and Implications," Working Papers 2014:04, Department of Economics, University of Venice "Ca' Foscari".
    12. He, Yongda & Lin, Boqiang, 2017. "The impact of natural gas price control in China: A computable general equilibrium approach," Energy Policy, Elsevier, vol. 107(C), pages 524-531.
    13. Bosello, Francesco & Roson, Roberto, 2006. "Climate Change, Energy Demand and Market Power in a General Equilibrium Model of the World Economy," Conference papers 331448, Purdue University, Center for Global Trade Analysis, Global Trade Analysis Project.
    14. Tchouamou Njoya, Eric, 2020. "An analysis of the tourism and wider economic impacts of price-reducing reforms in air transport services in Egypt," Research in Transportation Economics, Elsevier, vol. 79(C).
    15. Raymond Li, 2012. "Imperfect competition in the international coal industry – does it matter?," Economics Bulletin, AccessEcon, vol. 32(3), pages 1821-1830.
    16. Kazuhiko Oyamada, 2014. "Behavioral Characteristics of Applied General Equilibrium Models with Flexible Trade Specifications Based on the Armington, Krugman, and Melitz Models," EcoMod2014 6704, EcoMod.
    17. Chris Murphy, 2016. "The effects on consumer welfare of a corporate tax cut," Departmental Working Papers 2016-10, The Australian National University, Arndt-Corden Department of Economics.
    18. Oyamada, Kazuhiko, 2014. "Neutrality in the choice of number of firms or level of fixed costs in calibrating an Armington-Krugman-Melitz encompassing module for applied general equilibrium models," IDE Discussion Papers 465, Institute of Developing Economies, Japan External Trade Organization(JETRO).
    19. Braymen, Charles B., 2011. "Sectoral structure, heterogeneous plants, and international trade," Economic Modelling, Elsevier, vol. 28(4), pages 1967-1976, July.
    20. Dessus Sebastien & Ghaleb Joey R, 2008. "Trade and Competition Policies for Growth in Lebanon: A General Equilibrium Analysis," Review of Middle East Economics and Finance, De Gruyter, vol. 4(1), pages 59-80, January.
    21. Oyamada, Kazuhiko, 2015. "Behavioral characteristics of applied general equilibrium models with an Armington-Krugman-Melitz encompassing module," IDE Discussion Papers 525, Institute of Developing Economies, Japan External Trade Organization(JETRO).
    22. Innwon Park, 2006. "East Asian Regional Trade Agreements: Do They Promote Global Free Trade?," Pacific Economic Review, Wiley Blackwell, vol. 11(4), pages 547-568, December.

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    JEL classification:

    • D58 - Microeconomics - - General Equilibrium and Disequilibrium - - - Computable and Other Applied General Equilibrium Models
    • F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies; Fragmentation
    • L16 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Industrial Organization and Macroeconomics; Macroeconomic Industrial Structure

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