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"Krugman (1989) argued that differences across countries in estimated income elasticities of import demand are due to omission of an exporter supply effect. He showed that such an effect can be derived in a theoretical model with economies of scale in production and a taste for variety in consumption. In his model, countries grow by producing new varieties of goods, and they are able to export these goods without suffering any deterioration in their terms of trade. This paper analyzes U.S. import demand from different source countries and finds strong evidence of a supply effect of roughly half the magnitude (0.75) of the income elasticity (1.5). Price elasticities for the most part are estimated close to -1, which is typical for the literature. Exclusion of the supply effect leads to overestimation of the income elasticity. Results based on U.S. exports to different destinations are less robust, but largely corroborate these findings"--Federal Reserve Board web site.
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Long-run supply effects and the elasticities approach to trade
2003, Federal Reserve Board
Electronic resource
in English
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Edition Notes
Also available in print.
Includes bibliographical references.
Title from PDF file as viewed on 9/16/2004.
System requirements: Adobe Acrobat Reader.
Mode of access: World Wide Web.
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