Kubo Y
J Reg Sci. 1986 Aug;26(3):579-93. doi: 10.1111/j.1467-9787.1986.tb01061.x.
"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."
本文使用两部门增长模型研究城市集聚的机制和程度。城市化的原因在于城市规模经济的存在。假设临时生产决策涉及最优劳动力投入，且利润收入根据相对盈利能力进行再投资，该模型显示出城市集聚的持续趋势以及经济从无限劳动力供给向有限劳动力供给的转变。一个简单的例子表明，与城市收缩时农村扩张相比，城市集聚的可能性更大。
