破解伯川德悖论的新视角——修改前提下的古诺模型分析

New Viewpoint of Dissecting Bertrand's Paradox ——Analysis of Cournot Model with Modified Hypotheses

通过对一般动态古诺模型的分析,指出其未解开反而加强了伯川德悖论的原因,在于其假定前提离现实经济实际太远 为此,对假定前提进行了修正:寡占厂商进入行业市场的成本递增,产品的边际成本不为零 经过数学推导,获得了以下结论:递增的进入成本限定了寡头数目;边际成本的存在使市场容量减小;寡头竞争不会轻易恢复完全竞争.

The analysis of the general Cournot model shows that the reason for strengthening, instead of dissecting, the Bertrand's paradox lies in that its assumed preconditions are far away from the real economic conditions. For this reason, the assumed preconditions were modified as follows: the cost of oligopoly manufacturers' entering a professional market increases continuously and the marginal cost of products does not equal zero. Through rigorous mathematical deduction, the following conclusions were drawn, i.e., the number of oligopolies is limited by the increasing cost-of-entry, the market capacity is decreased by the existence of the marginal cost, and oligopolistic competition will not result in perfect competition easily.