为什么PPP还需要做重大修正?——评霍诺汉《使用PPP进行国家间比较的优势与不足》

Why Does PPP Need a Major Revision?——Comment on《Using Purchasing Power Parities to Compare Countries: Strength and Shortcomings》by Honohan

霍诺汉先生新近关于ICP的论文《使用PPP进行国家间比较的优势与不足》(Using Purchasing Power Parities to Compare Countries:Strength and Shortcomings)深入探讨了国际比较机理和经济意义,并指出了“购买力平价(PPP)”的不足,其批判精神与思考内容均值得重视。本文是对霍诺汉论文的一个经济统计学评论,基于对论文背景及内容的概述,探讨了文中值得关注和思考的几点问题,主要包括:ICP基于对市场汇率法的否定;各轮ICP间的“动态一致性”;基于生产率因素对ICP结果的修正;注重ICP的比较机理和现实意义;基于全球化因素对ICP的修正,并进一步地对未来ICP需要拓展研究的若干课题提出展望。经济统计在全球经济事务中起着独立作用,对于国际经济统计标准与数据,我们不仅要认真解读和应用,同时也要深入挖掘其内在的测度、核算和比较逻辑,以弥补和修正现行标准的不足,强化国际经济治理。

Mr. Honohan’s recent paper on ICP 《Using Purchasing Power Parities to Compare Countries: Strength and Shortcomings》deeply discussed the mechanism and economic significance of international comparison and pointed out the deficiency of "purchasing power parity(PPP)", whose critical spirit and thinking content are worth paying attention to. This paper is an economic statistical review of Honohan’s paper. Based on the overview of the background and content of the paper, several issues worth paying attention to and thinking about are discussed, including: the denial of ICP based on market exchange rate method;the "dynamic consistency" between ICP rounds;revision of ICP results based on productivity factors;focus on the comparative mechanism and practical significance of ICP;the ICP is revised based on the factors of globalization, and some topics that need to be further studied in ICP in the future are put forward. Economic statistics plays an independent role in global economic affairs. As for international economic statistics standards and data, we should not only carefully interpret and apply them, but also deeply explore their inherent measurement, accounting and comparative logic, so as to make up for and correct the shortcomings of current standards and strengthen international economic governance.