论城市化中城市的最优规模——一个简单的城市经济模型

On the Optimal Scale of Cities in Urbanization:A Simple Urban Economy Model

在城市化与经济增长相互促进的关系问题上,较为多见的一个观点是:在中国西部省份,经济增长对城市化的推动作用强于城市化对经济增长的促进作用,即城市化对其经济增长的促进作用不明显。原因何在?文章试图为解决这个问题建立一个理论框架。首先,对城市化促进经济增长的理论与机制作了一番梳理,指出其核心在于城市的聚集经济。然后,在此基础上,运用边际分析思想构建了一个规模优化的城市经济模型,此时,城市的净规模收益达到最大。

As for ion is round. First, growth Then, model. the mutual promotion between urbanization and economic growth, a common opinthat economic growth promotes urbanization in a bigger way than the other way To justify this argument, this paper attempts to set up a theoretical framework. the theories and mechanisms regarding the promotion of urbanization for economic are summarized, and the agglomeration urban economy is argued to be the focus. based on that, marginal analysis is applied to construct an optimal urban economic In this way the maximal urban net scale returns are obtained.