...为竞争目的而进人市场的电信运营商的生产结构是否符合自然垄断的基本条件，即生产成本是否具有成本次可加性(cost subadditivity)。他的研究结果发现，如果让AGT公司单独经营本地电话及投币电话，其成本的次可加性仍然很显著。
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Strict Cost Subadditivity 具有严格劣加性
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.
自然垄断的特征与规模经济、范围经济、网络经济和沉没成本有着紧密联系，但其根本特征是成本的劣加性。
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