A discriminatory tariff can be welfare superior to free trade in the presence of regional economies of scale. This is because a tariff on non-regional trade concentrates trade within a region, lowering the cost of transportation, so that the gains from economies of scale can theoretically offset the losses from the tariff. To complement the theoretical point I estimate the relation between transportation cost and regional volume of trade. The estimates suggest that a 10% increase in the volume of trade brings about 2.5% reduction in transportation cost in the long run.
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Find related papers by JEL classification: F10 - International Economics - - Trade - - - General F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies
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References listed on IDEAS Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
Hummels, David, 2001.
"Time as a Trade Barrier,"
GTAP Working Papers
1152, Center for Global Trade Analysis, Department of Agricultural Economics, Purdue University.
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