Explain Purchasing Power Parity.
Answer: PPP () states that the exchange rate between two countries' currencies equals the ratio of the countries' price levels.
A decrease in a currency's domestic purchasing power that is an increase in the domestic price level will be associated with proportional currency depreciation in the foreign exchange market and vice versa.
E$/E = PUS/PE
where P is the price of the reference commodity basket Rearrange:
PUS = (E$/E) x (PE)
Therefore, Purchasing Power Parity (PPP) asserts that all countries' price levels are equal when measured in terms of the same currency.