基于Bertrand模型的港口演化稳定策略研究

Research on the Strategy of Port Evolution Stability Based on Bertrand Model

摘要: 本文通过Bertrand模型推导出港口的成本函数，需求函数和利润函数，据此建立了港口的合作竞争的模型，研究了不同合作竞争组合情况下的演化稳定策略。得出：当两港口竞争强度过大或过小均不可取，只有在竞争强度满足 时，两港口存在长期稳定的Nash均衡状态，此时港口1选择合作策略，港口2选择竞争策略，长期来看这是最有利于双方的决策。因而港口与港口之间不应止步于传统的各自发展，在新的市场竞争环境中，应进一步考虑如何通过不同程度的竞争合作实现长期收益最大化及整体最优与稳定。

Abstract: This paper derives the demand function and profit function of the port's cost function through the Bertrand model, and establishes the model of the cooperation competition of the ports, it also studies the evolutionary stabilization strategy under the circumstances of different cooperative competition combinations. It is concluded that: if the two ports’ competition is too strong or too small, it won’t be adopted. Only when the strength of the competition is satisfied for  , will the two ports have a stable state of Nash equilibrium for a long time. Under this circumstance, the port 1 will choose the cooperation strategy and the port 2 will choose the competition strategy, this is the most favorable decision for both sides in the long run. Therefore, the ports should not stop in the traditional development. In the new market competition environment, we should further consider how to maximize the long-term profit and the overall optimization and stability through different degrees of competition and cooperation.