What is Purchasing Power Parity (PPP) used for?

• A. A method that adjusts currency values by relative price levels to enable cross-country comparisons of living standards and real incomes.
• B. A tax rate used for international trade.
• C. A measure of population parity.
• D. A method for calculating real wages growth across countries using relative prices.

Answer: (A)

Purchasing Power Parity is a way to adjust currencies so that price differences between countries don’t distort comparisons. By looking at how much of a common basket of goods each currency can buy, PPP shows what exchange rate would equalize purchasing power across countries. This lets us compare living standards and real incomes on a like-for-like basis, and explains why economists often express GDP and other measures in PPP terms. It isn’t a tax rate for trade, nor a measure of population parity, and while PPP-adjusted comparisons can inform real-wage analyses, the main idea is aligning currencies to price levels so you can compare what people can actually buy.