一个基于两层CES效用函数的垄断竞争模型

A monopolistic competition model based on a Two-level CES utility function

Dixit-Stiglitz模型提供了一个易于处理的垄断竞争分析框架,但其对称性假设降低了模型的解释力;产品特征法模型虽然解决了不对性问题,但在实际应用中却很难处理.通过构建一个由两层CES函数组成的效用函数,建立了一个具有不对性特点的垄断竞争模型,并利用模型分析了出境旅游的发展对国内旅游的影响.

The asymmetry hypothesis of Dixit-Stiglitz model does not suit reality though it is easy to deal with in a monopolistic competition market. The Characteristics Approach model is an asymmetric monopolistic competition model, but it＇s difficult to deal with. By constructing a Two-level CES utility function, we established an asymmetric monopolistic competition model, which is an extendability of Dixit-Stiglitz model. As an example, we analyzed the outbound-tourism＇s influence upon the domestic tourism.