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  • J. Bradford DeLong, Inside the Business Enterprise: Historical Perspectives on the Use of Information (University of Chicago Press, 1991), chap. 6, https://www.nber.org/books-and-chapters/inside-business-enterprise-historical-perspectives-use-information/did-j-p-morgans-men-add-value-economists-perspective-financial-capitalism.

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The pre-WWI period saw the heyday of "financial capitalism" in the United States: the concentration of securities...

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