Advanced Search
MyIDEAS: Login to save this article or follow this journal

Les leçons du mariage entre les modèles d’équilibre général calculable et la nouvelle théorie du commerce international


Author Info

  • Cockburn, John

    (Centre de recherche en économie et finance appliquées (CRÉFA), Université Laval)

  • Decaluwé, Bernard

    (Centre de recherche en économie et finance appliquées (CRÉFA), Université Laval)

  • Dostie, Benoît

    (Centre de recherche en économie et finance appliquées (CRÉFA), Université Laval)


The new trade theory shows that taking into account imperfect competition and economies of scale can drastically modify our predictions concerning the impact of trade policy. However, despite the apparent importance of these phenomena and the extent of current trade liberalization in developing countries, there are extremely few empirical trade analyses which consider them. Further, we find that the principal exception to this rule is a study that contains a modelling inconsistency leading to a considerable overestimation of the pro-competitive effects of trade liberalization. We present in detail the theoretical foundations and the procedure to follow in consistently modelling imperfect competition in a traditional computable general equilibrium trade model. An illustration is then provided through an analysis of Tunisian trade policy options which indicates that very limited pro-competitive effects are to be expected from trade liberalization. La nouvelle théorie du commerce international démontre que la présence de concurrence imparfaite et d’économies d’échelle peut modifier de manière radicale les impacts de politiques commerciales. Toutefois, malgré l’ampleur apparente de ces deux phénomènes dans les pays en développement et les réformes commerciales qui y sont présentement appliquées, très rares sont les études empiriques qui en tiennent compte. De plus, nous montrons que la principale étude qui fait exception contient une incohérence de modélisation qui mène à une surestimation considérable de l’effet dit procompétitif de la libéralisation commerciale. Nous présentons en détail les fondements théoriques et la procédure à suivre pour une intégration cohérente de la concurrence imparfaite dans un modèle traditionnel d’équilibre général calculable. Le fonctionnement du modèle est ensuite illustré à travers une application à la Tunisie, application qui indique que l’effet procompétitif à espérer de la libéralisation commerciale y est faible.

Download Info

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
File URL:
Download Restriction: no

Bibliographic Info

Article provided by Société Canadienne de Science Economique in its journal L'Actualité économique.

Volume (Year): 74 (1998)
Issue (Month): 3 (septembre)
Pages: 381-413

as in new window
Handle: RePEc:ris:actuec:v:74:y:1998:i:3:p:381-413

Contact details of provider:
Web page:
More information through EDIRC

Related research



References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
as in new window
  1. Harris, Richard, 1984. "Applied General Equilibrium Analysis of Small Open Economies with Scale Economies and Imperfect Competition," American Economic Review, American Economic Association, vol. 74(5), pages 1016-32, December.
  2. Shantayanan Devarajan & Dani Rodrik, 1989. "Pro-Competitive Effects of Trade Reform: Results from a CGE Model of Cameroon," NBER Working Papers 3176, National Bureau of Economic Research, Inc.
  3. Devarajan, Shantayanan & Rodrik, Dani, 1989. "Trade Liberalization in Developing Countries: Do Imperfect Competition and Scale Economies Matter?," American Economic Review, American Economic Association, vol. 79(2), pages 283-87, May.
  4. Brown, D.K., 1993. "Properties of Applied General Equilibrium Trade Models with Monopolistic Competition and Foreign Direct Investment," Working Papers 321, Research Seminar in International Economics, University of Michigan.
  5. Little, I M D, 1987. "Small Manufacturing Enterprises in Developing Countries," World Bank Economic Review, World Bank Group, vol. 1(2), pages 203-35, January.
  6. de Melo, Jaime & Roland-Holst, David, 1990. "Industrial Organization and Trade Liberalization: Evidence from Korea," CEPR Discussion Papers 399, C.E.P.R. Discussion Papers.
  7. de Melo, Jaime & Roland-Holst, David, 1990. "An evaluation of neutral trade policy incentives under increasing returns to scale," Policy Research Working Paper Series 480, The World Bank.
Full references (including those not matched with items on IDEAS)


Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
as in new window

Cited by:
  1. Gautier, Jean-François, 2000. "Réformes douanières au Bénin et libéralisation commerciale du Nigeria. Un modèle EGC avec concurrence imparfaite appliquée au commerce trans-frontalier," Economics Papers from University Paris Dauphine 123456789/4936, Paris Dauphine University.
  2. Mage-Bertomeu, Sabine, 2006. "Les modèles d'équilibre général appliqués à la politique commerciale : développements récents," Economics Papers from University Paris Dauphine 123456789/1696, Paris Dauphine University.


This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.


Access and download statistics


When requesting a correction, please mention this item's handle: RePEc:ris:actuec:v:74:y:1998:i:3:p:381-413. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Bruce Shearer).

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.