方法：数据来源于宁波市第三次卫生服务调查资料，采用扩展线性支出系统模型。
METHODS: the model of extended linear expenditure system (ELES) was used to analyze the data from the third health service investigation in the city of Ningbo.
利用扩展线性支出系统模型对河南城镇居民的消费结构进行实证分析。
The article analyses consumption structure of urban resident in Henan province through adopting Extend Linear Expenditure System.
对于居民消费结构分析，现广泛采用扩展线性支出系统模型进行统计分析，并计算出各类商品的需求弹性。
Related to residential consumption analysis, extend linear expenditure system (ELES) is widely used in statistics analysis, and calculating the demand elasticity of various commodities.
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