The paper analyzes an extended Hotelling model with network externalities,and carries out the research on the impacts that network externalities put on competition tactics of companies.

• 本文将网络外部性同顾客选择与产品差异化理论结合,通过构建扩展的豪泰林模型研究了网络外部性对市场绩效与企业竞争策略的影响。