公私伙伴关系中风险分担的最适比率研究  

Research on Optimal Ratio of Risk Sharing for Public Private Partnership

作　　者：张阿迪[1] 沈江[1] 

机构地区：[1]天津大学管理与经济学部,天津300072

出　　处：《西安电子科技大学学报（社会科学版）》2016年第6期13-22,共10页Journal of Xidian University：Social Science Edition

基　　金：国家自然科学基金项目(71171143)

摘　　要：随着我国经济的发展,公私伙伴关系(PPP)项目日益流行和普遍。本文首先列出了政府和机构对公私伙伴关系(PPP)的多种定义,之后介绍了实践中最常用的四种公私伙伴关系形式。其次,本文将通过有效边界和无差异曲线证明风险分担最适比率的存在。同时,在马科维茨模型的基础上建立风险分担模型,并通过拉格朗日乘数法得到这一模型的解。最后,将此模型应用到一个实际案例——广东奥林匹克体育中心中,展示该风险分担模型的实用性和有效性。The public private partnership（PPP） projects become increasingly popular as the economic development of China. Firstly, this paper lists a variety of definition of PPP from government and institutions, then demonstrates four most popular forms of PPP in practice. Next, the paper proves the existence of the optimal ratio of risk sharing through efficient frontier and indifference curve. Also the paper builds a risk-sharing model based on the Markowitz model and solves it through the Lagrange multiplier method. Finally, this paper applies the model to solve the practical problem of Guangdong Olympic Sports Center, demonstrating the usefulness and effectiveness of the risk sharing model.

关 键 词：公私伙伴关系(PPP) 马科维茨模型 风险分担模型 拉格朗日乘数法 

分 类 号：F062[经济管理—政治经济学]