自然垄断的"三位一体"理论

传统自然垄断理论是建立在规模经济、范围经济和成本劣加性基础之上的，本文认为社会总价值或总效用和社会净收益的优加性是比成本劣加性更好地定义自然垄断的概念，并在对规模经济、范围经济和网络经济重新定义的基础上，从规模经济、范围经济、网络经济“三位一体”角度重新解释了自然垄断概念，提出了自然垄断的“三位一体”理论，为自然垄断产业规制及其改革奠定理论和实证基础。

"Trinity" Theory of Natural Monopoly

Traditional theory of natural monopoly was established on the basis of economies of scale, economies of scope and cost subadditivity. The paper holds that the superadditivity of total social value or total utility and net social revenue is a better concept to define natural monopoly than subadditivity. After redefining economies of scale, economies of scope and economies of network, the paper, from the perspective of the "trinity" of economies of scale, economies of scope and economies of network, gives a new explanation of the concept of natural monopoly, thus puts forward "trinity" theory of natural monopoly, which forms a theoretical foundation for the regulation of natural monopolistic industries and their reforms.