Explain Mundell's theory of optimum currency areas.
My theory of optimum currency areas, articulated in 1961, addresses the question of which regions or countries would benefit most from adopting a common currency. The key is to identify areas with high labor mobility, similar business cycles, and a degree of fiscal integration. These factors allow shocks to be absorbed more easily without resorting to exchange rate adjustments. When these conditions are met, the gains from reduced transaction costs and price stability outweigh the loss of independent monetary policy.
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