人口流动与阶层分化：改革开放以来中国社会结构的变迁

人口流动意味着社会系统处于吐故纳新的循环状态，表明作为商品的人力资源在市场化条件下动态配置。阶层分化总是和人们具有的某种社会属性密切相关，其中可见人口流动的状况。阶层分化的静态状况与人口流动叠加，共同作用形塑了社会结构。改革以来，农民工为主体的人口流动，先赋角色和后致角色同时决定的阶层分化，导致了中国社会结构发生巨大变迁。

Population Mobility and Stratum Differentiation:Changes of Social Structure in China Since the Reform

Migration means there is a metabolism cycle in social system, human resources are configured dynamically as com- modity under the condition of marketization. Stratum differentiation is always closely related to certain social properties, inclu- ding the status of the visible population flow. Because of superposition of Stratum differentiation in the static condition and popu- lation mobility, social structure is shaped. Since the Reform, social structure of China has changed hugely caused by population mobility with rural migrant workers as the main body, and stratum differentiation which was cast by congenital roles and status by self- efforts at the same time.