中文摘要：

国外非正规部门的研究始于20世纪70年代,最初研究的对象主要集中在发展中国家和地区,随着研究的深入,发现发达国家和地区也存在非正规部门,但存在方式和形成机制有别于发展中国家和地区。通过对国外非正规部门研究文献的系统梳理和分析,表明国外非正规部门的研究已形成一定的研究体系和理论成果,研究内容主要涉及非正规部门的边缘性和异质性等特征,非正规部门的空间集聚与分异,非正规部门存在与发展的理论,包括贫困就业论、二元经济论、规制论和嵌入论等,非正规部门与正规部门的联系,非正规部门的经济、社会影响以及非正规部门的正规化与政策等方面。但在从事非正规经济活动的人的空间特征、从综合视角分析非正规部门的形成发展过程、非正规部门对地域空间的影响以及对比研究和定量研究方面还较为欠缺。

英文摘要：

The concept of informal sector was first put forward by Hart in 1971,and then was used in a governmental report of ILO in the next year.Since the 1970s,the research on the informal sector rose rapidly overseas,which focused on the developing countries and regions initially.It was found that the informal sector also existed in the developed countries and regions as the research was carried out deeply.But it was different from the developing countries and regions in the way of existence and the mechanism of forming.The research on the informal sector overseas had formed a set of theory system and achievements,which included the characters,spatial agglomeration and differentiation of the informal sector,the relationship with the formal sector,the impacts,and the policies. The abroad research showed that the informal sector was marginal,heterogeneous and complicated.This economic activity had different intension and extension under different economic,social and systematic conditions.The spatial distribution of the informal sector took on unbalanced state and concentrated in the urban high intense activity area.Different types of the informal sector had spatial variations due to the suburbanization,the inner city decline,and the immigrants. The theories of the informal sector mainly included the poverty employment,the dual economy,the regulation,and the embeddedness theory.The poverty employment theory,also called the social marginalization theory,pointed out that the rural people were obliged to take the informal activities because they immigrated into cities more rapidly than the formal sectors could create the employment opportunities.The dual economy theory put forward that the upper circulations and the lower circulations were two opposite sectors of the urban economic activity,and the informal sector was one of the lower circulations.But the dual structure of the urban economy was changing with the urban development.Based on the poverty employment theory,the regulation theory considered that the informal sector