摘要
市场根据垄断程度的不同,可以分为完全竞争、垄断竞争、寡头垄断和完全垄断市场四种类型。基于古诺模型,用博弈论方法研究n个厂商市场情形的总产量、价格、总收益和消费者剩余并把它们归纳为统一的公式。从四种市场情形总产量和价格的特点推出其供给曲线的形状,进而比较其社会福利的状况。研究结果表明,随着垄断性的加强,市场的社会福利会越来越劣,完全竞争市场的社会福利最好,垄断竞争市场次之,寡头垄断市场更次,完全垄断市场的社会福利最差。
According to the monopolistic degree, markets can be divided into four types： perfect competition, monopolistic competition, oligopoly and monopoly markets. Total output, price, total revenue and consumer＇ s surplus were studied and summarized into unified formula of n firms markets by game theory method based on Cournot model Based on the characteristics of total outputs and prices of four kinds of markets, the shapes of their supply curves were decided, and then the status of their social welfares were compared. The results show that with the strengthening of monopoly, the social wel- fares of the markets will become increasingly inferior, the social welfares are the best in perfect competition markets, they are better in monopolistic competition ones, they are good in oligopoly ones, and they are bad in monopoly ones.
出处
《湖南财政经济学院学报》
2011年第4期49-52,共4页
Journal of Hunan University of Finance and Economics
关键词
线性需求
社会福利
完全信息静态博弈
古诺模型
收益最大化
linear demand
social welfare
complete information static game
Cournot model
revenue maximization
