I dealt with this subject in Perelman, Michael. 1994. "Fixed Capital, Railroad Economics and the Critique of the Market in the United States." _Journal of Economic Perspectives_, Vol. 8, No. 3 (Summer): pp. 189=E2=80=9195. I elaborate on this subject in a forthcoming book: _Railroading Economics: The Creation of the Free Market Mythology_ (NY: Monthly Review Press, January 2006). -- Michael Perelman