A simple model of imperfect competition, where 4 are few and 6 are many
A simple model of imperfect competition, where 4 are few and 6 are many
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不完全竞争的简单模型，其中 4 为少，6 为多
DOI：
10.1007/bf01737566
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发表时间：
1973
影响因子：
0.6
通讯作者：
R. Selten
中科院分区：
文献类型：
--
作者：
R. Selten
本文提出的理论在一个具有线性成本和需求的对称古诺模型的背景下考察了竞争者数量与合作倾向之间的关系，并辅之以关于合作可能性的具体制度假设。合作的行为形式被建模为非合作博弈中的动作。很少有供应商会最大化他们的共同利润，而许多供应商可能会采取不合作的行为，这一命题似乎不是一个假设，而是该理论的一个结论。对于本文分析的简单模型，可以给出一个明确的答案，即竞争者的“小群体”在哪里结束，而“大群体”在哪里开始：5是“少”和“多”的分界线。
The theory presented in this paper investigates the connection between the number of competitors and the tendency to cooperate within the context of a symmetric Cournot model with linear cost and demand, supplemented by specific institutional assumptions about the possibilities of cooperation. Cooperative forms of behavior are modelled as moves in a non-cooperative game. The proposition that few suppliers will maximize their joint profits whereas many suppliers are likely to behave non-cooperatively does not appear as an assumption but as a conclusion of the theory. For the simple model analyzed in this paper a definite answer can be given to the question where a “small group” of competitors ends and a “large group” begins: 5 is the dividing line between “few” and “many”.