收入水平与公共品需求结构关系探讨

在影响公共品需求结构的诸多因素中,收入水平的高低为最关键,收入水平与公共品需求结构有着直接的关系。按照需求弹性可将公共品分为高端产品、中端产品和低端产品三种类型。通过对收入水平不同群体的效用差异分析,推导出均衡公共品需求结构的形成与公共品收入扩展线。理论分析表明公共品需求结构随着收入增加而逐渐由低端产品向高端产品转移,并在一定经济水平出现拐点,从而为研究公共品的最佳供给结构提供了理论依据和基础。

Theoretical Analysis of the Relationship of Income Level and the Demand Structure of Public Goods

According to the elasticity of demand,we divide public goods into high-end goods,middle-end goods and low-end goods.Then,based on the utility differentiation analysis of income level related to various communities,we gain the equilibrium public goods demand structure and the public goods income expansion line.The theoretical analysis shows that public goods demand structure tend to shift from low-end goods to high-end goods gradually with the increasing of income and lead to an inflection point at a certain economic level.Therefore,the discussion in this paper provides a theoretical foundation for the research on the optimal supply structure of public goods.