欧盟的研究展示了加入GPA的收益:一是由于公开的竞争所带来的成本的节约。二是良好的治理框架。三是采用特定的政策来推动创新、绿色采购和从社会角度进行采购所带来的收益。这也是在全世界W T O所希望扮演的角色。希望通过展示欧盟统一政府采购市场带来的开放效益,能够推动更多的国家加入GPA。一、节约成本的收益欧盟的研究也展示了这一点。GPA是 EU research shows the benefits of joining the GPA: First, savings due to open competition. Second, a good governance framework. The third is to adopt specific policies to promote innovation, green procurement and procurement from the social point of view of the benefits. It is also the role that W T O wants to play around the world. It is hoped that more countries will be able to join the GPA by demonstrating the open benefits brought by the EU’s unified government procurement market. First, the cost-saving benefits EU studies also show this. GPA is