随着首都现代化进程的快速推进,北京山区的多功能作用日益明显。目前,北京人均国内生产总值已经达到3000美元以上水平,正进入经济社会发展的快速发展阶段。在这个阶段,社会对非商品性的产出更为关注,更加关注社会总福利最大化基础上的商品和非商品产出的协同问题。因此,研究北? With the rapid progress of the capital’s modernization, the multi-functional role of the mountainous areas in Beijing is increasingly evident. At present, Beijing’s per capita GDP has reached more than 3,000 U.S. dollars and is entering a phase of rapid economic and social development. At this stage, the society pays more attention to non-commodity output and pays more attention to the synergetic issue of commodity and non-commodity output based on the maximization of social total welfare. Therefore, research North?