中文摘要：

建立存在消费者多方购买情形时生产网络外部性产品的双寡头垄断企业博弈模型，研究企业定位定价策略和产品差异化问题。均衡结果表明，在消费者均匀分布和消费者集中分布且单方购买消费者认为网络外部性强度不是很大时，市场中多方购买消费者所占比例越大，产品间的差异化越大，均衡价格越高，均衡利润越大。

英文摘要：

In markets with network externalities, it is a common phenomenon for consumers with multihoming. This paper establishes dynamic game model of duopoly producing product with network externalities under consumer multihoming and analyzes location decisions and price decisions and product differentiation problems. The equilibrium results show that when consumer distribution is uniform and when it is centralized, but the evaluation of single-homing consumers to product network externality is not very big, the presence of multi-homing consumers can increases product differentiation and improve equilibrium prices and equilibrium profits.