中文摘要：

本文基于ccss《中国城乡居民生活综合调查》2006年的家庭微观调查数据分析了我国城乡家庭消费支出的分布特征，按有无社会保障把城乡家庭分别分为两组，利用分位数回归方法研究不同消费层次上，社会保障对城乡家庭消费的影响，并利用反事实分析与分位数分解方法对这两组家庭消费差异进行研究。主要结论有：有社会保障家庭人均消费要高于无社会保障家庭人均消费，消费收入弹性呈“几”字型，有社会保障和无社会保障家庭的消费差异主要是由收人、地产财富等差异造成的。最后，提出了具有针对性的政策建议。

英文摘要：

In this paper, we examined the distribution of consumption expenditure using the mirco survey data of ＂a comprehensive survey of Chinese urban and rural residents＂ from CGSS in 2006. Rural and urban residents are separately grouped into two groups, with social security and without social security. Quantile regression is used to study the effects of social security on household consumption on different consumption levels. Counterfaetual analysis and quantile decomposition are used to decompose the differences between the two groups＇ household consumption. The main conclusions are ： average basic consumption expenditure of households with social security is much higher than that of households without security. Finally, targeted policy recommendation was proposed.