偏差测度悖论与方法改进陷阱

Paradox in Deviation Measure and Trap in Method Improvement

由于现实测度中存在"真值不可知"问题,如何能够逼近真值,这里以国际经济比较中常用的汇率法和购买力平价法为例进行讨论,不难看出,不同方法测度偏差的测度存在着难以察觉的悖论,测度方法的改进存在着需要提防的陷阱。

Taking exchange rate method and purchase power parity method for example, this paper discusses how to get a closely true value from the existed"Unknown Value"in practical measure. It′s obvious that measure in different ways contains an unaware paradox in deviation measure and a cautionary trap in method improvement.