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Trade Policy under Firm-Level Heterogeneity in a Small Economy

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  • Svetlana Demidova
  • Andrés Rodríguez-Clare

Abstract

In this paper we explore the effect of trade policy on productivity and welfare in the now standard model of firm-level heterogeneity and product differentiation with monopolistic competition. To obtain sharp results, we restrict attention to an economy that takes as given the price of imports and the demand schedules for its exports (a "small economy"). We first establish that welfare can be decomposed into four terms: productivity, terms of trade, variety and curvature, where the latter is a term that captures heterogeneity across varieties. We then show how a consumption subsidy, an export tax, or an import tariff allow our small economy to deal with two distortions that we identify and thereby reach its first best allocation. We also show that an export subsidy generates an increase in productivity, but given the negative joint effect on the other three terms (terms of trade, variety and curvature), welfare falls. In contrast, an import tariff improves welfare in spite of the fact that productivity falls.

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Bibliographic Info

Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 13688.

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Date of creation: Dec 2007
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Publication status: published as Demidova, Svetlana & Rodríguez-Clare, Andrés, 2009. "Trade policy under firm-level heterogeneity in a small economy," Journal of International Economics, Elsevier, vol. 78(1), pages 100-112, June.
Handle: RePEc:nbr:nberwo:13688

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  1. Flam, Harry & Helpman, Elhanan, 1987. "Industrial policy under monopolistic competition," Journal of International Economics, Elsevier, vol. 22(1-2), pages 79-102, February.
  2. Andrew B. Bernard & Jonathan Eaton & J. Bradford Jensen & Samuel Kortum, 2003. "Plants and Productivity in International Trade," American Economic Review, American Economic Association, vol. 93(4), pages 1268-1290, September.
  3. Richard E. Baldwin & Rikard Forslid, 2010. "Trade Liberalization with Heterogeneous Firms," Review of Development Economics, Wiley Blackwell, vol. 14(2), pages 161-176, 05.
  4. Helpman, E., 1990. "Monopolistic Competition In Trade Theory," Princeton Studies in International Economics 16, International Economics Section, Departement of Economics Princeton University,.
  5. S. Baranzoni & P. Bianchi & L. Lambertini, 2000. "Market Structure," Working Papers 368, Dipartimento Scienze Economiche, Universita' di Bologna.
  6. Krugman, Paul, 1980. "Scale Economies, Product Differentiation, and the Pattern of Trade," American Economic Review, American Economic Association, vol. 70(5), pages 950-59, December.
  7. Mark J. Melitz, 2002. "The Impact of Trade on Intra-Industry Reallocations and Aggregate Industry Productivity," NBER Working Papers 8881, National Bureau of Economic Research, Inc.
  8. Marc Melitz & Ghironi, Fabio & Florin Bilbiie, 2006. "Monopoly Power and Endogenous Variety in Dynamic Stochastic General Equilibrium: Distortions and Remedies," Working Paper 14401, Harvard University OpenScholar.
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