关键词: CPI偏差, 生活成本, 恩格尔曲线

Abstract: This paper introduced Hamilton-Costa method which is based on Engel’s Law and provide the first estimate of overall CPI bias to estimate the CPI bias since 1997 with Chinese City Statistical Data. It finds that accumulative CPI bias is inexistent in 1998 and the period between 2000 and 2006, but 5.85 percent in 1999. The finding implys that we can use CPI to describe the city’s Cost of Live in 1998 and the period between 2000 and 2006. The paper also finds cross-sectional dissimilitude and timely leap of Engel’s Coefficient in china, the relation between expenditure and Engel’s coefficient shows quantitative difference in the city of china, and the statistical data shows that Chinese Engel’s Coefficient experienced a leap in the year about 2000.

Key words: CPI bias, Cost of Live, Engel’s Law