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Exchange Rate Mechanism
Used prior to the adoption of the euro, a method for reconciling differing exchange rates between currencies, allowing participation in the single European currency. Established in 1979, it was known as a "semi-pegged" system in which currencies were variable with respect to each other only within a certain range. After the introduction of the euro in 1999, the exchange rate mechanism was replaced by ERM II, which reconciles exchange rates for countries wishing to join the eurozone.