Idea that the rate of change in the price level of commodities in one country relative to the price level in another determines the rate of change of the exchange rate between the two countries' currencies.
RELATIVE PURCHASING POWER PARITY (R.P.P.P.)
Meaning of RELATIVE PURCHASING POWER PARITY (R.P.P.P.) in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012