Tow methods are used for calculationg economic aggregates at comparable prices 1 . multiplying the output of products by their constant prices of certain year ; 2 . deflation of data at current prices by relevant price index 按可比价格计算总量指标有两种方法：一种是直接用产品产量乘某一年的不变价格计算：另一种是用价格指数进行伸缩。
