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中文摘要：
从供应链角度研究产能约束往往忽视了企业间的横向竞合关系，本文构建了Stackelberg博弈模型，通过对下游企业采取的两种不同策略的比较，分析了具有产能约束的网络型寡头垄断产业链中企业的决策问题，并分析了网络外部性及价格歧视对企业决策的影响。研究表明：网络外部性对产业链内所有企业的产量决策产生多种影响，但其最终影响具有不确定性；无论下游企业采取竞争策略还是合谋策略，下游企业的均衡产量均相等且采取竞争策略时获得较大产量，而上游企业在中间产品市场采取价格歧视策略将获得更多的收益。
英文摘要：
Researchers always omit horizontal co--operation relationships which are from supply chain angle among enterprises. We build a Strackelberg model and analyze the decision research of network oligopoly market industry chain with capacity restraint by comparing two different strategies of downstream enterprises, network externality and price discrimination also have been analyzed in the model. Some conclusions can be drawn： network externality plays an important part in optimal decision of enterprises which are in industry chain, but the sum effect is not sure because of many factors. The optimal production is equal in the downstream enterprises no matter what strategies they choose, enterprises will get much production when they choose competition strategy. Enterprises of upstream will get much more profit when they choose price discrimination.
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