20世纪90年代以来,我国城乡居民的人均收入有了较大的提高,但同时也伴随着城乡居民收入差距的日益扩大。本文通过以1978年为基年的居民消费价格指数、商品零售价格指数对数据进行处理,采用三次曲线模型对剔除物价影响后的收入差进行了拟合,同时对2008年的实际收入差进行了预测。 Since the 1990s, per capita income of urban and rural residents in our country has been greatly increased, but at the same time, the income gap between urban and rural residents has been widening. In this paper, the consumer price index and commodity retail price index are used to process the data in the base year of 1978, and the curve of the cubic curve is used to fit the income difference after excluding the price impact. At the same time, the real income difference prediction.