Abstract：In 2014， the Chinese government reseted the classification criterion for city sizes， converting from four to five types， tightening the control over the number of internal migrants in mega cities and large-scale cities. Nevertheless， stringent policies like these failed to reach anticipated consequences of the regulation of migration. This paper points out the following reasons why this failure should occur： the government finds difficulties in deterring the influx of migrants； the management of group renting is not feasible； higher income and better opportunities for career development motivate internal migrants to work in cities other than attaining quality public services， etc.
熊易寒. 为什么特大城市的外来人口控制政策难以奏效[J]. 华中师范大学学报（人文社会科学版）, 2017, 56(6): 11-21.
Xiong Yihan. The Politics of City Sizes： Why Migration Control Policies in Mega Cities Won’t Work？. journal1, 2017, 56(6): 11-21.
2017, Vol. 56 
