Abstract: nlarging the size of middle-income group is the proper meaning of promoting common prosperity This paper uses 60% and 200% of the median income of 28 EU countries as the lower and upper cutoffs to define Chinese middleincome group and analyzes its size and growth path from an international perspective The results show that the size of middleincome group in China has grown rapidly，from less than 1% in 2002 to 247% in 2018，and its number is similar to the total number of middleincome group in 28 EU countries and similar to the total population of the United States in that year In the past 20 years，among several major middleincome countries，only the size of middleincome group in China has maintained rapid growth Compared with developed countries，the proportion of middleincome group in China is still low，and it is still in the climbing stage of “GDP per capita” and “the proportion of middleincome group” The birth background beyond personal control，such as Hukou type，parents employment and education level，and place of birth，has a significant impact on a persons probability of being middleincome group In the future，we should pay special attention to those who are born in disadvantaged backgrounds and provide them with smooth channels to enter the middleincome group

Key words:  , middle-income group, standards of developed countries, international comparison, growth path

摘要： 扩大中等收入群体是推动实现共同富裕的应有之义。本文使用“欧盟28国2018年收入中位数的60%与200%”作为界定中等收入群体的上下限，从国际视角分析了我国中等收入群体的规模及成长路径。研究发现，我国中等收入群体规模增长迅速，从2002年的不到1%增长到2018年的24.7%，人数约相当于欧盟所有国家中等收入群体人数总和、美国当年总人口。与几个大型中等收入国家相比，近20年唯有我国的中等收入群体比重一直保持高速增长。与发达国家相比，我国中等收入群体比重仍偏低，还处于“人均GDP”与“中等收入群体比重”双低的爬坡阶段。不同户籍类型的人群成为中等收入者的路径明显不同，户籍类型、父母的就业和受教育水平、出生地等个人无法控制的出生背景，对一个人成为中等收入者的概率有较大影响。未来应尤为关注那些出生背景不利者，为他们进入中等收入行列提供畅通渠道和适当支持。

关键词: 中等收入群体, 发达国家标准, 国际比较, 成长路径