PPP模式运营期内公私部门合作机制的演化分析

Evolutionary Game Analysis of Coordination Mechanism for Operation Period in Public-private Partnerships Projects

摘要:

为研究PPP模式下项目运营期内的公私合作问题,以政府部门和私人部门有限理性为前提,基于演化视角建立双方的博弈模型,分析公私部门策略选择之间的影响机理,探讨收益分配、补贴力度、合作成本等因素对演化稳定策略的影响。研究结果表明,政府部门应关注私人部门的投入成本与收益分配的平衡对于双方合作选择的影响,避免补贴机制的失效；在一定情形下,私人部门投入成本的降低、超额收益的增加、政府外聘监管成本的上升均可使双方走向合作,超额收益存在一个最优分配系数,可有效地促成双方达成良好的协同关系；合理的惩罚机制的设置,也可以促进双方的合作。

关键词:PPP模式;合作机制;收益分配;运营期

Abstract:

FOR the study of public-private cooperation mechanism in operation period of PPP projects, given the bounded rationality of government and the private sector, a public-private cooperation evolution model was established. By using this model, the mechanism of interaction between them, income distribution, incentive and supervision, cooperation cost and other factors affecting the evolution stability of the system were analyzed. The results show that the government should balance the excess income distribution to avoid the failure of supervision and incentive mechanism; the decrease of private cost and increase of excess income and supervision cost have a positive correlation with the cooperation of both sides; there is an optimal proportion of excess income allocation that makes a win-win co-operation of both sides; a reasonable punishment mechanism can also promote bilateral cooperation.

Key words:PPP model; coordination mechanism; income distribution; operation period