There are three problems when real estate price is appraised by means of market comparison approach, namely, collection of cases, revision of index factors and determination of appraisal results.

市场法评估房地产价格时的三个难题，即，交易实例的搜集、指标因素的修正以及估价结果的确定。

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In the national market, we collect and collate the real estate price index of our country. After pass an examination we set up an ARMA model to predict the future trend of the real estate price index.

在全国市场上，收集整理我国的房产价格指数，通过检验建立ARMA模型对未来的房地产价格指数的走势做出预测。

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Real estate price index is a relative quantitative indicators that reflects the changes of the price in the real estate market in different periods, It's a so-called "pure price index".

房地产价格指数是反映不同时期房地产市场价格水平的变化趋势和程度的相对数量指标，是所谓的“纯价格指数”。

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