收入是消费的物质前提和保障。现代经济增长理论认为,当居民收入增长到一定水平时,其消费水平也会随之提高,并相应产生消费结构和消费方式的变动。1992年以来,北京市居民收入与消费发生明显变化,居民消费水平提高所表现出的共同性和收入水平不同导致消费水平与消费结构的差异性均十分突出,这主要表现在以下四个方面—— Income is the material premise and guarantee of consumption. According to the theory of modern economic growth, when the income of residents increases to a certain level, their consumption level will also increase, and corresponding changes in consumption structure and consumption patterns will result. Since 1992, significant changes have taken place in income and consumption of residents in Beijing. The commonalities and levels of income shown by the rising consumption level of residents have led to great differences in the level of consumption and consumption structure. This is mainly manifested in the following four aspects - -