The basic concept of agglomeration economies is that production is facilitated when there is a clustering of economic activity. Cities are clusters of economic activity, and agglomeration improves efficiency.
聚集型经济的本质就是,在已知有一些经济活动趋向于抱团时,城市便成为了这些‘抱团’经济活动的聚集场所,并且这种聚集型经济能够有效地提高生产效率。