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Vertical product differentiation and the import demand function: theory and evidence

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  • Jim Malley
  • Thomas Moutos

Abstract

In this paper we use a model of vertical product differentiation to cast doubt on the general validity of the import demand function as specified in macroeconomic models. The empirical importance of our theoretical concerns is then established. According to our first hypothesis, the share of a good’s imports in total imports is non‐increasing in domestic wages if the country has comparative advantage in high‐quality varieties of this good. The second hypothesis states that the share of a good’s imports is increasing in non‐wage domestic income if the country has comparative advantage in high‐quality varieties of this good. JEL Classification: F4, F41 Différenciation verticale des produits et fonction de demande d’importations : théorie et résultats. Dans ce mémoire, les auteurs utilisent un modèle de différenciation verticale des produits pour jeter certains doutes sur la validité générale de la fonction de demande d’importations telle que spécifiée dans les modèles macroéconomiques. L’importance empirique de ces malaises théoriques est étudiée à l’aide de deux hypothèses. La première hypothèse suggère que la part d’un bien dans les importations totales d’un pays ne va pas croître quand les salaires du pays s’accroissent si le pays a un avantage comparatif dans les variétés de haute qualité de ce bien. La seconde hypothèse suggère que la part d’un produit qui provient de l’importation croît quand le revenu intérieur non‐salarial s’accroît si le pays a un avantage comparatif dans les variétés de haute qualité de ce bien. On observe des résultats qui donnent un support empirique ferme à ces deux propositions en analysant les données en provenance de l’Allemagne, du Japon et des Etats‐Unis.

Suggested Citation

  • Jim Malley & Thomas Moutos, 2002. "Vertical product differentiation and the import demand function: theory and evidence," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 35(2), pages 257-281, May.
  • Handle: RePEc:wly:canjec:v:35:y:2002:i:2:p:257-281
    DOI: 10.1111/1540-5982.00130
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    Cited by:

    1. Malley, Jim & Moutos, Thomas, 2006. "Do excessive wage increases raise imports?: Theory and evidence," Japan and the World Economy, Elsevier, vol. 18(2), pages 194-220, March.
    2. Antonis Adam & Thomas Moutos, 2023. "Do Public Sector Employment Reductions Promote Informality?," CESifo Working Paper Series 10614, CESifo.
    3. Margarita Katsimi & Thomas Moutos, 2005. "Inequality and Relative Reliance on Tariffs: Theory and Evidence," CESifo Working Paper Series 1457, CESifo.
    4. Antonis Adam & Margarita Katsimi & Thomas Moutos, 2012. "Inequality and the import demand function," Oxford Economic Papers, Oxford University Press, vol. 64(4), pages 675-701, October.
    5. Eugenia Fotoniata & Thomas Moutos, 2013. "Product Quality, Informality, and Child Labor," Review of Development Economics, Wiley Blackwell, vol. 17(2), pages 268-283, May.
    6. Antonis Adam & Thomas Moutos, 2002. "The Political Economy of EU Enlargement: Or, Why Japan is not a Candidate Country?," CESifo Working Paper Series 704, CESifo.
    7. Muhammad Ahad & Talat Afza & Muhammad Shahbaz, 2017. "Financial Development and Estimation of Import Demand Function in Pakistan: Evidence from Combined Cointegration and Causality Tests," Global Business Review, International Management Institute, vol. 18(1), pages 118-131, February.
    8. Margarita Katsimi & Thomas Moutos, 2010. "Inequality and the Relative Reliance on Tariffs," Review of International Economics, Wiley Blackwell, vol. 18(1), pages 121-137, February.

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    JEL classification:

    • F4 - International Economics - - Macroeconomic Aspects of International Trade and Finance
    • F41 - International Economics - - Macroeconomic Aspects of International Trade and Finance - - - Open Economy Macroeconomics

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