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New Trade Models, New Welfare Implications

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  • Marc J. Melitz
  • Stephen J. Redding

Abstract

We show that endogenous firm selection provides a new welfare margin for heterogeneous firm models of trade (relative to homogeneous firm models). Under some parameter restrictions, the trade elasticity is constant and is a sufficient statistic for welfare, along with the domestic trade share. However, even small deviations from these restrictions imply that trade elasticities are variable and differ across markets and levels of trade costs. In this more general setting, the domestic trade share and endogenous trade elasticity are no longer sufficient statistics for welfare. Additional empirically observable moments of the micro structure also matter for welfare.

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Bibliographic Info

Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 18919.

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Date of creation: Mar 2013
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Handle: RePEc:nbr:nberwo:18919

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  1. Andrew Atkeson & Ariel Burstein, 2007. "Innovation, Firm Dynamics, and International Trade," Levine's Working Paper Archive 122247000000001423, David K. Levine.
  2. Costas Arkolakis & Arnaud Costinot & Andrés Rodríguez-Clare, 2009. "New Trade Models, Same Old Gains?," NBER Working Papers 15628, National Bureau of Economic Research, Inc.
  3. Jonathan Eaton & Samuel Kortum, 2002. "Technology, Geography, and Trade," Econometrica, Econometric Society, vol. 70(5), pages 1741-1779, September.
  4. Andrew B Bernard & Jonathan Eaton & J. Bradford Jensen & Samuel Kortum, 2000. "Plants and productivity in international trade," Working Papers 00-08, Center for Economic Studies, U.S. Census Bureau.
  5. Robert C. Feenstra, 2010. "Measuring the gains from trade under monopolistic competition," Canadian Journal of Economics, Canadian Economics Association, vol. 43(1), pages 1-28, February.
  6. Andrew B. Bernard & J. Bradford Jensen & Stephen J. Redding & Peter K. Schott, 2007. "Firms in International Trade," Journal of Economic Perspectives, American Economic Association, vol. 21(3), pages 105-130, Summer.
  7. Dennis Novy, 2010. "International Trade Without CES: Estimating Translog Gravity," CEP Discussion Papers dp1031, Centre for Economic Performance, LSE.
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Cited by:
  1. Antonella Nocco & Gianmarco I. P. Ottaviano & Matteo Salto, 2013. "Monopolistic Competition and Optimum Product Selection: Why and How Heterogeneity Matters," CEP Discussion Papers dp1206, Centre for Economic Performance, LSE.
  2. Helpman, Elhanan, 2013. "Foreign Trade and Investment: Firm-Level Perspectives," CEPR Discussion Papers 9482, C.E.P.R. Discussion Papers.
  3. Oyamada, Kazuhiko, 2014. "Neutrality in the choice of number of firms or level of fixed costs in calibrating an Armington-Krugman-Melitz encompassing module for applied general equilibrium models," IDE Discussion Papers 465, Institute of Developing Economies, Japan External Trade Organization(JETRO).
  4. Breinlich, Holger & Ottaviano, Gianmarco & Temple, Jonathan, 2013. "Regional Growth and Regional Decline," CEPR Discussion Papers 9568, C.E.P.R. Discussion Papers.
  5. Robert C. Feenstra, 2014. "Restoring the Product Variety and Pro-competitive Gains from Trade with Heterogeneous Firms and Bounded Productivity," NBER Working Papers 19833, National Bureau of Economic Research, Inc.
  6. Bolatto, Stefano & Sbracia, Massimo, 2014. "Deconstructing the Gains from Trade: Selection of Industries vs. Reallocation of Workers," MPRA Paper 56638, University Library of Munich, Germany.

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