Simplified Real Exchange Rate Formula in a Common Currency Area
In a common currency area such as the eurozone, where the nominal exchange rate () between member countries is fixed at 1, the real exchange rate () simplifies to a direct ratio of price levels. For example, from a Spanish ('home') perspective relative to Germany ('foreign'), the formula becomes: This ratio represents the price of German goods and services () relative to the price of Spanish goods and services (), with both being measured in the same currency, the euro.
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