服务外包的制度创新：基于进入权的不完全契约

Service outsourcing is a kind of innovative form between market and firm. The main governance mechanism is that the outsourcee has to open its key resource to the outsourcer, in order to motivate the latter to carries on the corresponding specific human capital investment. Base on the access theory, a incomplete contract model is established and a comparative institutional analysis is performed toward the organization form of market, outsourcing and firm. We find that the organization form of service outsourcing, which exploits the governance power of access, could get the suboptimal incentive effectiveness, although all the three organizations forms couldn't get the social-best incentive effectiveness. By means of this governance mechanism, the partnership in services outsourcing become stable and effective, which can help the outsourcer to utilize human resources of knowledge resources in a wider scope.