Network Topology and Market Structure
Network Topology and Market Structure
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网络拓扑和市场结构
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Junjie Zhou
中科院分区：
文献类型：
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作者：
Ying‐ju Chen;Y. Zenou;Junjie Zhou
我们开发了一个两阶段寡头垄断网络竞争模型，首先，企业同时确定其价格，然后，通过网络连接的用户确定其产品的消费。我们表明，只有当竞争较弱时，更密集的网络（网络拓扑）才会降低价格，而更多的企业（市场结构）才会降低价格。然而，当竞争非常激烈并且有足够的网络外部性时，最有影响力的用户的价格可能会随着公司数量的增加而增加。我们还表明，竞争的加剧总是会导致企业利润下降，而网络密度的增加会导致利润曲线作为企业数量的函数顺时针旋转。最后，我们研究网络拓扑和市场结构对价格分散的影响，并从企业和用户的角度确定最优网络结构。
We develop a two-stage oligopolistic network competition model where, first, firms simultaneously determine their prices and, then, users connected through a network determine their product's consumption. We show that denser networks (network topology) reduce prices and that a higher number of firms (market structure) reduces prices only when competition is weak. However, the price for the most influential users can increase with the number of firms when competition is very fierce and when there are enough network externalities. We also show that increasing competition always leads to a lower firm's profit while increasing network density leads to a clockwise rotation of the profit curve as a function of the number of firms. Finally, we study the effect of network topology and market structure on price dispersion and determine the optimal network structure from the perspective of both firms and users.
DOI：
10.1111/1468-2354.t01-1-00021
发表时间：
2002-05
期刊：
Macroeconomics eJournal
影响因子：
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作者：
G. Ottaviano;T. Tabuchi;Jacques-François Thisse
通讯作者：
G. Ottaviano;T. Tabuchi;Jacques-François Thisse