The Causes of Metropolitan Suburbanization
研究大都市郊区化的两类理论：自然演化理论和中心城市财政社会问题理论，并介绍单中心模型、梯度测量及跨国比较，最后给出政策启示。
In this paper, we investigate the causes of metropolitan suburbanization. We consider two classes of theories of suburbanization, both of which are important: the first, favored by urban theorists and transportation experts, might be called a natural evolution theory; the second stresses the fiscal and social problems of central cities. We sketch the monocentric model of urban areas, discuss the gradient measure of suburbanization, and offer some cross-country comparisons of suburbanization. Finally we present conclusions and policy implications.