This dissertation analyzes the influence of product differentiation and economic barriers to entry on vertical integration by theoretical and empirical argumentation in the method of logical deduction and case analysis. 利用逻辑演绎与案例分析结合的方法,从理论和实证上论证了决定市场结构的产品差异化和经济性进入壁垒会影响企业纵向一体化的实施。