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Aggregate Industry Behaviour in a Monopolistic Competition Model with Heterogeneous Firms

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The paper analyses how a tractable representation of productivity heterogeneity among firms modifies the standard Dixit-Stiglitz (DS) model of monopolistic competition. The properties of the asymmetric model are explored by comparative statics analysis. The equilibrium adjustments of industry aggregates, such as the number of firms, output and the productivity of variable inputs are compared with the corresponding adjustments in the symmetric model. The analysis thereby clarifies when and why the standard DS model may provide a misleading picture of the aggregate industry behaviour. A by-product of the paper is to demonstrate that a more realistic description of a basic aspect of technology heterogeneity can be taken into account at a relatively low cost in terms of reduced tractability.

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  • Erling Holmøy, 2003. "Aggregate Industry Behaviour in a Monopolistic Competition Model with Heterogeneous Firms," Discussion Papers 352, Statistics Norway, Research Department.
    • Handle: RePEc:ssb:dispap:352
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    1. Tor Jakob Klette, 1999. "Market Power, Scale Economies and Productivity: Estimates from a Panel of Establishment Data," Journal of Industrial Economics, Wiley Blackwell, vol. 47(4), pages 451-476, December.
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    3. Tor Jakob Klette & Astrid Mathiassen, 1996. "Job Creation, Job Destruction and Plant Turnover in Norvegian Manufacturing," Annals of Economics and Statistics, GENES, issue 41-42, pages 97-125.
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    5. Leahy, D. & Montagna, C., 1997. "Strategic Trade Policy With Domestic Cost Asymmetries," Papers 97/27, College Dublin, Department of Political Economy-.
    6. Erling Holmøy & Torbjørn Hægeland, 1997. "Aggregate Productivity Effects of Technology Shocks in a Model of Heterogeneous Firms: The Importance of Equilibrium Adjustments," Discussion Papers 198, Statistics Norway, Research Department.
    7. Ragnar Frisch, 1950. "Alfred Marshall's Theory of Value," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 64(4), pages 495-524.
    8. C Montagna, "undated". "Strategic Trade Policy When Firms Have Different Efficiency Levels," Dundee Discussion Papers in Economics 070, Economic Studies, University of Dundee.
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    More about this item

    Keywords

    Monopolistic competition; productivity heterogeneity; aggregation;
    All these keywords.

    JEL classification:

    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L16 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Industrial Organization and Macroeconomics; Macroeconomic Industrial Structure

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