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The Effects of Trade Liberalization on Productivity and Welfare: The Role of Firm Heterogeneity, R&D and Market Structure

  • Ngo Van Long


    (Department of Economics, McGill University, Montreal)

  • Horst Raff


    (Department of Economics, University of Kiel)

  • Frank Staehler


    (Department of Economics, University of Otago)

This paper develops an oligopolistic model of international trade with heterogeneous firms and endogenous R&D to examine how trade liberalization affects firm and industry productivity, as well as social welfare. We identify four effects of trade liberalization on productivity: (i) a direct effect through changes in R&D investment; (ii) a scale effect due to changes in firm size; (iii) a selection effect due to inefficient firms leaving the market; and (iv) a market-share reallocation effect as efficient firms expand and inefficient firms reduce their output. We show how these effects operate in the short run when market structure is fixed, and in the long run when market structure is endogenous. Among the robust results that hold for any market structure are that trade liberalization (i) increases (decreases) aggregate R&D for low (high) trade costs; (ii) increases expected firm size if trade costs are high; and (iii) raises expected social welfare if trade costs are low.

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Paper provided by University of Otago, Department of Economics in its series Working Papers with number 0710.

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Length: 29 pages
Date of creation: Jun 2007
Date of revision: Jun 2007
Handle: RePEc:otg:wpaper:0710
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  1. Brander, James & Krugman, Paul, 1983. "A 'reciprocal dumping' model of international trade," Journal of International Economics, Elsevier, vol. 15(3-4), pages 313-321, November.
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  11. Josh Ederington & Phillip McCalman, 2007. "The Impact of Trade Liberalization on Productivity Within and Across Industries: Theory and Evidence," Monash Economics Working Papers 24-07, Monash University, Department of Economics.
  12. Choi, E. Kwan & Harrigan, James, 2003. "Handbook of International Trade," Staff General Research Papers Archive 11375, Iowa State University, Department of Economics.
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  17. Bernard, Andrew B. & Bradford Jensen, J., 1999. "Exceptional exporter performance: cause, effect, or both?," Journal of International Economics, Elsevier, vol. 47(1), pages 1-25, February.
  18. Mary Amiti & Jozef Konings, 2007. "Trade Liberalization, Intermediate Inputs, and Productivity: Evidence from Indonesia," American Economic Review, American Economic Association, vol. 97(5), pages 1611-1638, December.
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  28. repec:rus:hseeco:122439 is not listed on IDEAS
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