Real versus nominal value (economics)
Gross domestic product (GDP) is a measure of aggregate output. Nominal GDP in a particular period reflects prices which were current at the time, whereas real GDP compensates for inflation. Price indices and the U.S. National Income and Product Accounts are constructed from bundles of commodities and their respective prices. In the case of GDP, a suitable price index is the GDP price index. In the U.S. National Income and Product Accounts, nominal GDP is called "GDP in current dollars" (that is, in prices current for each designated year), and real GDP is called "GDP in [base-year] dollars" (that is, in dollars that can purchase the same quantity of commodities as in the base year).
List of countries by GDP (PPP) per capita
There are many natural economic reasons for GDP-per-capita to vary between jurisdictions (e.g. places rich in Oil & Gas reserves tend to have high GDP-per-capita figures). However, it is increasingly being recognized that tax havens, or corporate tax havens, have distorted economic data which produces artificially high, or inflated, GDP-per-capita figures. It is estimated that over 15% of global jurisdictions are tax havens (see tax haven lists). An IMF investigation estimates that circa 40% of global FDI flows, which heavily influence the GDP of various jurisdictions, are described as "phantom" transactions.