进入壁垒是影响市场结构的重要因素,是指产业内既存企业对于潜在进入企业和刚刚进入这个产业的新企业所具有的某种优势的程度。换言之,是指潜在进入企业和新企业若与既存企业竞争可能遇到的种种不利因素。进入壁垒具有保护产业内已有企业的作用,也是潜在进入者成为现实进入者时必须首先克服的困难。 Barriers to entry are important factors affecting the market structure and refer to the extent to which an existing enterprise in the industry has some advantage over both potential entry and new entry into the industry. In other words, it refers to all kinds of unfavorable factors that potential entry enterprises and new enterprises may encounter if they compete with existing ones. Entry barriers have the function of protecting the existing enterprises in the industry and also the difficulties that must be overcome first when potential entrants become reality entrants.