According to types of commodity, it can be divided into goods price index of an individual event, the classification price index of the goods and total index.

按商品种类不同，分为单项商品价格指数、商品类别价格指数和总指数。

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More than 50, 000 individual prices are collected in each survey round, and a cost-of-living index is calculated from the price data to express the difference in the cost of living between any two cities.

ECONOMIST: Oslo remains the world's most expensive city