CAJ | 학술논문

文章完善了城市化时间路径方程的推导，归纳了城市化时间路径曲线的趋势特征，并纠正和阐释了理论界对城市化参数关系的诸多误解。在不变URGD（城乡人口增长率差）设定下，城市化水平路径表现为一条右上倾斜的“S”型曲线，城市化水平速度路径表现为一条倒“U”型曲线，城市化水平加速度路径表现为一条斜“Z”型曲线；只要存在两个时点的城乡人口数据，城市化全部参数关系均已给定，不需要求助于城市化水平与时间变量的线性回归，城市化水平变化趋势也不存在饱和值约束问题。在可变URGD设定下，城市化曲线则表现出不同程度的变异，倒“U”型URGD设定下，城市化曲线的峰值更高并且明显左移；随城市化水平线性下降URGD设定下，城市化曲线则依赖初始URGD值而表现更复杂变异。
문장완선료성시화시간로경방정적추도，귀납료성시화시간로경곡선적추세특정，병규정화천석료이론계대성시화삼수관계적제다오해。재불변URGD（성향인구증장솔차）설정하，성시화수평로경표현위일조우상경사적“S”형곡선，성시화수평속도로경표현위일조도“U”형곡선，성시화수평가속도로경표현위일조사“Z”형곡선；지요존재량개시점적성향인구수거，성시화전부삼수관계균이급정，불수요구조우성시화수평여시간변량적선성회귀，성시화수평변화추세야불존재포화치약속문제。재가변URGD설정하，성시화곡선칙표현출불동정도적변이，도“U”형URGD설정하，성시화곡선적봉치경고병차명현좌이；수성시화수평선성하강URGD설정하，성시화곡선칙의뢰초시URGD치이표현경복잡변이。
This paper conducts the derivation of the urbanization curves on different hypotheses, and corrects the misunderstanding on the relationship between urbanization parameters. Under the as- sumption of constant urban and rural growth difference in population （ URGD）, the time-path curve of urbanization level, velocity and acceleration would separately show a rightward ＂S＂ shape, an inverted ＂U＂ shape, and an oblique ＂Z＂ shape. Also with this constant URGD assumption, all parameters are to be set as long as two arbitrary time points of urban and rural population data are given. There is no need to turn to the linear regression between the urbanization level and time variable, and the con- straint on the saturated value of urbanization level does not exist. However, under the varying URGD assumption, the urbanization curve would show certain differentiation relying on the degree of variation on URGD. With the setting of an inverted ＂U＂ shape URGD, the peak of urbanization curve would be higher and obviously shift to the left, whereas with the setting of a linear decreased URGD, the urbani- zation curve would appear more variation dependent upon the initial value of URGD.