URBAN CONCENTRATION AND RURAL GROWTH A TWO‐SECTOR ANALYSIS*
用一个两部门增长模型研究城市集中的机制和程度，认为城市规模经济是城市化的原因，模型显示城市集中有持续趋势，且经济会从无限劳动力供给转向有限劳动力供给。
"This paper examines the mechanism and extent of urban concentration using a two-sector growth model. The cause of urbanization is sought in the existence of urban scale economies. Assuming that temporary production decisions are concerned with optimal labor inputs and that profit incomes are reinvested according to relative profitability, the model shows persistent tendency for urban concentration and the transition of the economy from unlimited to limited labor supply. A simple example suggests that urban concentration is more likely than rural expansion with urban contraction."