Household Registration Reform,Labor Mobility and Optimization of the Urban Hierarchy

户籍改革、劳动力流动与城市层级体系优化（英文）

A rational hierarchy of rank-size distribution is indispensable for optimizing the urban hierarchy. On the basis of the number of permanent urban residents, using rank-size rule testing and core density estimation within the framework of spatial economics, we set up a labor force location choice model and conducted quantitative simulations. Our fmdings show that the structure of China＇s urban hierarchy differs from the pyramid structure of Zipf＇s Law, and the household registration system impedes the free movement of labor and makes the size distribution of cities deviate from Pareto optimality. Household registration （hukou） reform will be conducive to the optimization of the urban hierarchy. Optimizing the urban hierarchy should become a consistent objective in today＇s development of new-type urbanization, city clusters and metropolitan areas.

合理的"等级-规模"分布层级结构,是城市层级体系优化的必要条件。根据我国城市常住人口人数,利用"等级-规模"法则检验和核密度估计,并基于空间经济学框架,建立劳动力区位选择模型,且进行数值模拟,结果发现:我国城市层级结构与幂律为1对应的金字塔结构存在差异,户籍制度阻碍了劳动力自由流动,使城市规模分布偏离了帕累托最优。户籍改革有助于优化我国城市层级体系。优化城市层级体系,应该成为当前新型城镇化与城市群、都市圈建设的一致目标。