基于Hotelling模型变体的双寡头研究

A Duopoly Research on a Varied Hotelling Model

对艾奇沃斯模型得出的不稳定价格和产出的结论,霍特林(Hotelling)建立一个空间模型并提出,在运输成本存在的情况下,价格和产出都是唯一确定的。Hotelling模型为研究空间竞争问题提供一个经典的范式,但是模型本身不能解释两厂商的串谋。本文将放松原模型中消费者的刚性需求假定,引入需求密度函数,弱化区位竞争,重点考察单位运输成本,把研究角度锁定在价格博弈层面上,有效的解释双寡头之间的串谋,并认为模型结论取决于单位运输成本。

On the unstable price and output in Edgeworth model,Hotelling establishes a spatial model to confirm that the price and output are unique and stable when the transport cost exists.Hotelling model provides a method to research spatial competition,but can not explain collusion.This essay will relax the assumption about consumer＇s rigid demand,then consider a demand density function,weaken the location competition,and emphasis on the unit transport cost.The research focusing on price game can effectively explain the collusion of duopoly,and the conclusions of the model depend on unit transport cost.