外部效应与城市政策选择──从北京城市增容费政策所引发的思考陶然近期，北京市将交纳城市增容费作为获得北京城市户口的先决条件。政策刚一出台，立刻在各政府机关、企事业单位，特别是高等院校引起较大争议。北京市城市增容费政策，主要是考虑到北京市近年人口增加过快... Externalities and Urban Policy Choices - A Reflection on Beijing’s City Capacity-Building Policies Tao Ran Recently, Beijing City will pay urban fees for urban renewal as a precondition for obtaining Beijing city hukou. As soon as the policy was promulgated, it immediately sparked major controversy among government agencies, enterprises and institutions, especially higher education institutions. Beijing city capacity increase fee policy, mainly taking into account the rapid increase of population in Beijing in recent years ...