关于要素逆检验

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效率与生产率分析引论，p95 有写到：如果直接构建价格指数和数量指数用的是同一个公式，并且指数比值相同，那么这个公式就满足这个检验——要素逆检验
能否详细说明一下，没有看懂这句话表达的意思。

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关键词：效率与生产率分析 数量指数 详细说明 价格指数 生产率

哦。自己找到了：
According to the factor reversal test if the factors i.e. Price and quantity in a price or quantity index formula be interchanged so that a quantity or price index number formula is obtained, then the product of these formulae should be the value index number.

Pon X  Qon= summation pnqn/ summation poqo.

These test are used to check that which method is best to calculate index number. These tests are used to check the accuracy of the index number obtained from different resources. They help to compare the values of index numbers.

According to the factor reversal test if the factors i.e. Price and quantity in a price or quantity index formula be interchanged so that a quantity or price index number formula is obtained, then the product of these formulae should be the value index number.

Pon X  Qon= summation pnqn/ summation poqo.

These test are used to check that which method is best to calculate index number. These tests are used to check the accuracy of the index number obtained from different resources. They help to compare the values of index numbers