IDEAS home Printed from
MyIDEAS: Log in (now much improved!) to save this paper

Les leçons du mariage entre les modèles d'équilibre général calculable et la nouvelle théorie du commerce international: application à la Tunisie

Listed author(s):
  • Cockburn, John


  • Decaluwe, Bernard
  • Dostie, Benoît

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 appliquées 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 pro-compétitif 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 pro-compétitif à espérer de la libéralisation commerciale y est faible. 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 liberalisation in developing countries, there are extremely few empirical trade analyses which take them into account. Further, we find that the principal exception to this rule is a study which contains a modelling inconsistency leading to a considerable overestimation of the pro-competitive effects of trade liberalisation. We present in detail the theoretical foundations and the procedure to follow in consistently modelling imperfect competition in a tradition 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 liberalisation.

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

Paper provided by Université Laval - Département d'économique in its series Cahiers de recherche with number 9804.

in new window

Date of creation: 1998
Handle: RePEc:lvl:laeccr:9804
Contact details of provider: Postal:
Pavillon J.A. De Sève, Québec, Québec, G1K 7P4

Phone: (418) 656-5122
Fax: (418) 656-2707
Web page:

More information through EDIRC

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.:

in new window

  1. Katrak, Homi, 1977. "Multi-national Monopolies and Commercial Policy," Oxford Economic Papers, Oxford University Press, vol. 29(2), pages 283-291, July.
  2. 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 1016-1032, December.
  3. Devarajan, Shantayanan & Rodrik, Dani, 1991. "Pro-competitive effects of trade reform : Results from a CGE model of Cameroon," European Economic Review, Elsevier, vol. 35(5), pages 1157-1184, July.
  4. Mark J. Roberts & James R. Tybout, 1991. "Size Rationalization and Trade Exposure in Developing Countries," NBER Chapters,in: Empirical Studies of Commercial Policy, pages 169-200 National Bureau of Economic Research, Inc.
  5. Asad Alam, 1995. "The New Trade Theory and its Relevance to the Trade Policies of Developing Countries," The World Economy, Wiley Blackwell, vol. 18(3), pages 367-385, 05.
  6. Westbrook, M Daniel & Tybout, James R, 1993. "Estimating Returns to Scale with Large, Imperfect Panels: An Application to Chilean Manufacturing Industries," World Bank Economic Review, World Bank Group, vol. 7(1), pages 85-112, January.
Full references (including those not matched with items on IDEAS)

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

When requesting a correction, please mention this item's handle: RePEc:lvl:laeccr:9804. 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: (Manuel Paradis)

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.

This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.