Pieter (Jop) WOLTJER

ABSTRACT: The release of the Penn World Table version 9.1 is the fourth release since the switch to the ‘Next Generation of the Penn World Table’, see Feenstra, Inklaar and Timmer (2015). PWT 9.1 does contain important new and revised data.This document provides an overview of the changes, with a more detailed discussion of particular topics in specific documents. The changes fall in three broad categories, namely, I) the incorporation of new purchasing power parities (PPPs) data for a range of countries; II) the incorporation of revised and extended National Accounts data, covering the period up to 2017; and, most notably, III) a change in the methodology of capital measurement, with a move to the concept of capital services for estimating growth and comparative levels of productivity.

AUTHORS: Robert Inklaar and Pieter Woltjer

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