所有权、成本函数与市场竞争结构

Ownership,Cost Functions and Market Competitive Structures

不同产业拥有不同的成本结构,而不同的所有权结构决定了不同的市场竞争结构。文章的研究表明,在双寡头竞争中,由于成本函数(一次型和二次型假设)不同、市场竞争结构不同,相应的社会产出、价格、利润、社会福利都会有所不同。同时,当国有企业的边际成本高于私有企业的边际成本,即存在效率差异时,在不同的成本函数假设下,社会福利与效率差异的变动关系也会不同。

There are different cost structures in different industries, while different ownership structures shape the different market competition structures. The research results show that: the corresponding social output, price, profit and social welfare will all be different with the different cost functions (one-time and two-time hypothesis) and different market competition structures in oligopoly. Meanwhile, when the marginal cost of a state-owned enterprise is higher than that of a private enterprise, that is to say, there exists different efficiency, the relations of social welfare and efficiency in different cost functions are different, under the different cost functions hypothesis.