Relative purchasing power parity

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Relative purchasing power parity (RPPP)

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

A theory that the purchasing power of two currencies differs by the same proportional rate. This differs from the absolute form of purchasing power parity, which states that the purchasing power between two currencies is the same. However, the concepts are similar because RPPP holds that the absolute form would be true if there were no interference of taxes, quality of products, and other circumstances that change the market. One must take into account all these circumstances to calculate the proportional rate by which the purchasing power changes.
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