Objectives and Orientation. Industry Structure and Performance in Perfectly Contestable Markets: The Single Product Case. Ray Behavior and Multiproduct Returns to Scale. Cost Concepts Applicable to Multiproduct Cases. The Cost-Minimizing Industry Structure. Input-Price Changes, Cost Functions, And Efficient Industry Structure. Natural Monopoly: Sufficient Conditions for Subaddivity. Monopoly Equilibrium. Equilibrium in the Multiproduct Competitive Industry. Fixed Costs, Sunk Costs, Entry Barriers, Public Goods, And Sustainability of Monopoly. Sustainable Industry Configurations: General Industry Structures in Contestable Markets. Powers of the Market Mechanism. Intertemporal Sustainability. Intertemporal Unsustainability. Toward Empirical Analysis. Toward Application of the Theory. Developments Since the Book. Bibliography. Index.