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国际比较项目中维持区域内固定性的最小二乘方法AI 解读

The International Comparisons Program (ICP) compares the purchasing power of currencies and real income across countries. ICP is broken up into six regions. Global results are then obtained by linking these regions together at both basic heading level and the aggregate level in a way that satisfies within-region fixity (i.e., the relative parities of a pair of countries in the same region are the same in the global comparison as in the within-region comparison). Standard…

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指数序列的拼接AI 解读

This article demonstrates the compelling case for using the geometric mean formula for splicing overlapping index number series. The justification for using the geometric mean rests on the fact that it is the only symmetric mean formula that generates a spliced series that is invariant to rescaling of the original series.