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  • Robert E. Lipsey, International Trade in Services and Intangibles in the Era of Globalization (University of Chicago Press, 2009), chap. 1, https://www.nber.org/books-and-chapters/international-trade-services-and-intangibles-era-globalization/measuring-international-trade-services.

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World trade in services has recently been a little under $US2 trillion, about a quarter of world trade in goods. That...

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