by Pierre-Alain Pionnier, Head of CLIs, Prices & Environmental Accounts Section, Francette Koechlin, Head of Prices & PPPs Unit, and Sophie Bournot, Statistician for PPPs, OECD Statistics Directorate
All travellers know that the prices of goods and services vary between countries. In order to capture these price differences, Eurostat and the OECD collect data on the prices of identical goods and services in their member countries, and compile “Purchasing Power Parities” (PPPs) – conversion rates that neutralise price differences between countries. The collection spans hundreds of products and allows PPPs to be calculated for various classes of goods and services, and for macroeconomic aggregates such as gross domestic product (GDP). PPPs help economists and other users of statistics who want to compare GDP, income and consumption across economies with a proper adjustment for price differentials, in order to better assess the size of economies, productivity and material well-being.
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