The characteristic of the natural monopoly of the latest definition is the cost subadditivity.
最新定义的自然垄断的特点是代表性企业成本函数的弱增性。
Natural monopoly is characterized by economies of scale and production cost subadditivity in the traditional and new theory of natural monopoly.
现有自然垄断理论从规模经济和成本劣加性定义了自然垄断。
The natural monopoly is mainly shown as economies of scale, economies of scope, economies of network and sunk cost, etc, but its basic characteristic is the subadditivity of cost.