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本文利用扩展线性支出系统对1996年北京市城镇居民的消费结构进行分析，以揭示城镇居民消费结构的特征和变动规律。一、扩展线性支出系统。所谓扩展线性支出系统（ExtendlinearExpendicturesystem，简写为ELES），是在常规的线性支出系统基础上建立的。该系统克服了常现分析缺
In this paper, an extended linear expenditure system is used to analyze the consumption structure of urban residents in Beijing in 1996 to reveal the characteristics and changes of urban residents’ consumption structure. First, expand linear spending system. The so-called extended linear expenditure system (ExtendlinearExpendicturesystem, ELES for short), is built on the conventional linear expenditure system. The system overcomes the lack of regular analysis