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"A purchasing power parity (PPP) between two countries, A and B, is the ratio of the number of units of country A’s currency needed to purchase in country A the same quantity of a specific good or service as one unit of country B’s currency will purchase in country B. PPPs can be expressed in the currency of either of the countries. In practice, they are usually computed among large numbers of countries and expressed in terms of a single currency, with the U.S. dollar (US$) most commonly used as the base or “numeraire” currency" - Global Purchasing Power Parities and Real Expenditures. 2005 International Comparison Program. The World Bank.

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World in 2030

Access and compare forecasts for more than 50 indicators related to a country’s economic, demographic, and energy futures from leading international institutions. Assess the historic quality of forecasts with our Forecast Accuracy Tracking Tool™ and select the most accurate forecast to support your analysis.

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