1Chandler,Jr. ,Alfred D. Scale and Scope:The Dynamics of Industrial Capitalism [ M ]. Cambridge, Massachusetts:The Beliknap Press of Harvard University press, 1990.
2Panzar, John C. and Robert D. Willig. Economies of Scope[J]. American Economic Review, 1981, (2): 268-272.
3Shepherd, W. G. Monoploy Profits and Economies of Scale[A]. John Craven ed. Industrial Organization, Antitrust and Public Policy [C]. Boston: Kluver Nijhof,1968.
