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Distorted Trade Barriers: A Comment on “Distorted Gravity”

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  • Matthew T Cole

    (University College Dublin)

Abstract

Since firm heterogeneity has been introduced into international trade models, the importance of firm entry and exit (the extensive margin) has been highlighted. Thomas Chaney (2008) illustrates how accounting for heterogenous firms (and this extensive margin) alters the standard gravity equation. In particular, it reverses the previously predicted effect the elasticity of substitution has on the elasticity of trade flows. Further, Chaney shows that the elasticity of trade flows with respect to variable trade costs is a constant. As is common, iceberg transport costs are used as the variable trade barrier. However, in many empirical studies, ad valorem tariffs are also used as a form of trade barrier, which as Cole (2010) points out, is not isomorphic to iceberg transport cost in a monopolistically competitive setting. In this comment, I solve the Chaney (2008) model using ad valorem tariffs instead of iceberg transport costs and show the elasticity of trade flows with respect to tariffs is not constant, but depends on the elasticity of substitution.

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File URL: http://www.ucd.ie/t4cms/wp10_19.pdf
File Function: First version, 2010
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Bibliographic Info

Paper provided by School Of Economics, University College Dublin in its series Working Papers with number 201019.

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Length: 13 pages
Date of creation: 08 Jun 2010
Date of revision:
Handle: RePEc:ucn:wpaper:201019

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Related research

Keywords: Intra-industry Trade; Gravity; Firm heterogeneity; Monopolistic competition;

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Cited by:
  1. Matthew Cole, 2011. "Not all trade restrictions are created equally," Review of World Economics (Weltwirtschaftliches Archiv), Springer, vol. 147(3), pages 411-427, September.

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