A study on the public transport policy that has positive social benefit and negative operator profit

被认为是赤字的公共交通项目往往可以产生积极的社会效益。这类项目不能由经营者自主决定，需要建立一种机制来推进这类项目。其次，以某大都市区为例，分析了衡量这一问题的方法。最后，通过构建兼顾社会效益的公共交通服务机制，提高公共交通服务水平。

Public transport projects which are considered to be deficit can often have positive social benefit. This kind of projects can not be carried out by operators own decision and it is necessary to construct a mechanism to advance these projects.This research first analyze why this kind of problems occur theoretically and practically. Next the way that we can measure such problem is analyzed, by referencing some metropolitan area. Finally, we show that service level of public transportation can be raised by constructing a mechanism which considers the social benefit.