What, and why do we use, Purchasing Power Parity [PPP]

-Comparing GDP per Capita across Nations that use different Currencies may not give an Accurate Picture, as the Worth of the Currency is not being Considered -PPP is the Real Value of an amount of Money in terms of what you can Buy with. £1 can get more Goods in Zimbabwe rather than Switzerland -PPP therefore will Adjust the GDP per Capita to account the PPP Disparities, usually shown in $