house prices calm base price

This additional prices calm base quotient index, common people how comprehension calm base index?

Answer: calm base price index contrast base in a certain period maintain relatively fixed, the social public familiar stock index is a calm base price index. Theoretically, calm base price index number structure change on eliminating the influence of price changes, simply reflect price changes.

Compared with year-on-year price index,  index in use more intuitive convenient. Using calm base price index also can compute the different contrast the base price index. For example, the march and February calm base price index XiangChu again multiply 100, you will get the march than in February of annulus comparing price index. By analogy, can calculate your need to price index, observe the changes of different periods house prices.

Secondhand room existence "yin-yang contract" situation, how to ensure that the data quality?

Answer: to ensure survey data sources of representative and avoid second-hand housing "yin-yang contract", the influence of the new scheme regulation, second-hand house prices through the investigation and the way of the combination of the typical survey sent survey collection, selected estate broker orgnaization sales of second-hand housing should be accounted for local total turnover of more than 75%, the selection of different sample both residential geographic location.

Because of this survey is a comprehensive survey, sample size and the distribution of the directly related to the basic data of representative, accordingly, "75% above" regulation is completely in order to ensure that the survey data sources of representative, improve second-hand housing sales price based data for the authenticity and accuracy.