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List of countries by GDP (nominal) - Wikipedia

Gross domestic product (GDP) is the market value of all final goods and services from a nation in a given year. Countries are sorted by nominal GDP estimates from financial and statistical institutions, which are calculated at market or government official exchange rates. Nominal GDP does not take into account differences in the cost of living in different countries, and the results can vary greatly from one year to another based on fluctuations in the exchange rates of the country's currency. Such fluctuations may change a country's ranking from one year to the next, even though they often make little or no difference in the standard of living of its population. Comparisons of national wealth are also frequently made on the basis of purchasing power parity (PPP), to adjust for differences in the cost of living in different countries. //  Дальше — en.wikipedia.org

List of countries by GDP (PPP) - Wikipedia

This article includes a list of countries by their forecasted estimated gross domestic product based on purchasing power parity, abbreviated GDP (PPP). Countries are sorted by GDP PPP forecast estimates from financial and statistical institutions in the limited period January–April 2017, which are calculated at market or government official exchange rates. The data given on this page are based on the international dollar, a standardized unit used by economists. GDP comparisons using PPP are arguably more useful than those using nominal GDP (see List of countries by GDP (nominal)) when assessing a nation's domestic market because PPP takes into account the relative cost of local goods, services and inflation rates of the country, rather than using international market exchange rates which may distort the real differences in per capita income. It is however limited when measuring financial flows between countries. PPP is often used to gauge global poverty thresholds and is used by the United Nations… //  Дальше — en.wikipedia.org

The World Factbook — Central Intelligence Agency

The Office of Public Affairs (OPA) is the single point of contact for all inquiries about the Central Intelligence Agency (CIA). We read every letter, fax, or e-mail we receive, and we will convey your comments to CIA officials outside OPA as appropriate. However, with limited staff and resources, we simply cannot respond to all who write to us. Submit questions or comments online By postal mail: Central Intelligence Agency Office of Public Affairs Washington, D.C. 20505 By phone:(703) 482-0623Open during normal business hours. //  Дальше — www.cia.gov