本文从产业组织的角度,对W市旅行社行业的市场集中度、产品差别程度和进入退出壁垒三个方面进行了分析,得出了W市的旅行社业的强竞争、弱垄断的竞争型市场结构。一、研究内容产业的市场结构是指企业市场关系的特征,其实质就是市场竞争与垄断的关系。产业市场结构的判断依据有三个方面:本行业内企业数量及相对规模;各企业生产的产品差异化程度;进入、退出壁垒。分为完全竞争市场、垄断竞争市场、寡头垄断市 From the perspective of industrial organization, this article analyzes the market concentration, the degree of product differentiation and the barriers to entry and exit of the travel agency industry in W City, and finds out the strong competition and the weak monopoly competitive market structure of W travel agency . First, the research content Industry market structure refers to the characteristics of the relationship between the market enterprises, its essence is the relationship between market competition and monopoly. The structure of the industrial market is judged on the basis of three aspects: the number and relative size of the enterprises in the industry; the degree of product differentiation produced by the enterprises; barriers to entry and exit. Divided into fully competitive market, monopoly competition market, oligopoly market