基于期权博弈的PPP项目特许权期决策模型

政府加强对在华境外非政府组织的管理，首先应完善其注册制度。目前，除了外国商会和境外基金会在华分支机构有专门的管理条例外，大多数在华境外非政府组织缺乏合适的注册制度安排。双重管理体制、不完善的注册法律法规、注册带来的政治顾虑、注册信息获取困难等是在华境外非政府组织注册面临的主要难题。结合当前在华境外非政府组织注册的实际情况，文中提出探索直接登记制度、完善注册管理法律体系、建立项目登记与报备制度、加强在华境外非政府信息管理等建议。

Concession Period Decision Models for Public Private Partnership Based on Option Games

This paper, taking the government investment and sharing risks into consideration, manages to seek out concession period decision models for Public Private Partnership with option game theory, studies the influence of government investment on concession period and demonstrates the above-mentioned models in the Guangshen highway. The result shows that when earnings volatility was stable, concession period reduced with the increase of the lowest income expectation value, while under certain lowest income expectation value of government, concession period increased with the increase of earnings volatility. Still, the paper puts forward the argument that the government shall implement flexible concession period in accordance with the specific circumstances of Public Private Partnership.