“缺失”的垄断厂商供给曲线研究——对供求理论的新探索

A Study on the Supply Curve of "Missing" Monopoly Firms——A New Exploration on Supply and Demand Theory

在传统西方微观经济学理论中,垄断厂商是没有供给曲线的,可以称之为"垄断厂商供给曲线的缺失"。通过限制厂商需求曲线的移动方式为平行移动,可以得到一条适合于所有厂商(包括垄断厂商)的供给曲线。在这条由一个方程来表示的供给曲线中,各类厂商供给曲线的差异由需求价格弹性的高低来决定,而需求价格弹性又受厂商所占市场份额大小影响。

In the theory of traditional western microeconomics,monopoly firms have no supply curves,which can be called ＂the missing supply curve of monopoly firms＂.By limiting the moving way of the supply curves as parallel displacement,a supply curve which fits all firms（including monopoly firms） is found.In this supply curve represented by an equation,the supply curve differences of different firms are decided by price elasticity of demand,and the price elasticity of demand is further influenced by the market share of the firms.