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Market Size, Trade, and Productivity

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  • Ottaviano, Gianmarco
  • Melitz, Marc

Abstract

We develop a monopolistically competitive model of trade with firm heterogeneity—in terms of productivity differences—and endogenous differences in the "toughness" of competition across markets—in terms of the number and average productivity of competing firms. We analyse how these features vary across markets of different size that are not perfectly integrated through trade; we then study the effects of different trade liberalization policies. In our model, market size and trade affect the toughness of competition, which then feeds back into the selection of heterogeneous producers and exporters in that market. Aggregate productivity and average mark-ups thus respond to both the size of a market and the extent of its integration through trade (larger, more integrated markets exhibit higher productivity and lower mark-ups). Our model remains highly tractable, even when extended to a general framework with multiple asymmetric countries integrated to different extents through asymmetric trade costs. We believe this provides a useful modelling framework that is particularly well suited to the analysis of trade and regional integration policy scenarios in an environment with heterogeneous firms and endogenous mark-ups.

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Bibliographic Info

Paper provided by Harvard University Department of Economics in its series Scholarly Articles with number 3229096.

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Date of creation: 2008
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Publication status: Published in Review of Economic Studies
Handle: RePEc:hrv:faseco:3229096

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References

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  2. repec:rus:hseeco:122439 is not listed on IDEAS
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  4. Pavcnik, Nina, 2002. "Trade Liberalization, Exit, and Productivity Improvement: Evidence from Chilean Plants," Review of Economic Studies, Wiley Blackwell, vol. 69(1), pages 245-76, January.
  5. PierrePhilippe Combes & Gilles Duranton & Laurent Gobillon & Diego Puga & Sébastien Roux, 2009. "The Productivity Advantages of Large Cities: Distinguishing Agglomeration from Firm Selection," SERC Discussion Papers 0027, Spatial Economics Research Centre, LSE.
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  7. Chad Syverson, 2004. "Market Structure and Productivity: A Concrete Example," NBER Working Papers 10501, National Bureau of Economic Research, Inc.
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  18. Horstmann, Ignatius J. & Markusen, James R., 1986. "Up the average cost curve: Inefficient entry and the new protectionism," Journal of International Economics, Elsevier, vol. 20(3-4), pages 225-247, May.
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