International Comparison of CBD Development
定义了中央商务区（CBD）并比较了中外CBD的土地开发强度，发现中国CBD就业密度和土地利用强度低，主因是开放和绿地占比高，这削弱了城市集聚效应。
This paper first defines CBD and illustrates CBD’s characteristics in terms of land development intensity. It then shows that CBDs in Chinese cities have low employment density and land use intensity comparing to international standards,although buildings heights are comparable. The main reason for lower land use intensity in Chinese cities’CBDs is because the high percentage of land is used for open and green spaces,which basically are absent in international cities like New York,Singapore,and London. The high percentage of open and green spaces in China also helps to lower overall employment density and then in turn reduce urban agglomerative effects.