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Heterogeneous Firms and Trade: Testable and Untestable Properties of the Melitz Model

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  • Richard Baldwin

Abstract

This paper sets out a basic heterogeneous-firms trade model that is closely akin to Melitz (2003). The positive and normative properties of the model are studied in a manner intended to highlight the core economic logic of the model. The paper also studies the impact of greater openness at the firm-level and aggregate level, focusing on changes in the number and type of firms, trade volumes and prices, and productivity effects. The normative effects of liberalisation are also studied and here the paper focuses on aggregate gains from trade, and income redistribution effects, showing inter alia that the model is marked by a Stolper-Samuelson like effect. A number of empirically testable hypotheses are also developed. These concern the impact of greater openness on the firm-level trade pattern, the variance of unit-prices, the stock market valuation of firms according to size, and the lobbying behaviour by size.

Suggested Citation

  • Richard Baldwin, 2005. "Heterogeneous Firms and Trade: Testable and Untestable Properties of the Melitz Model," NBER Working Papers 11471, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:11471
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    References listed on IDEAS

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    JEL classification:

    • F1 - International Economics - - Trade
    • F2 - International Economics - - International Factor Movements and International Business
    • F3 - International Economics - - International Finance

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