A monetary union is modelled as a technology that makes surprise devaluations impossible but requires voluntarily participating countries to follow the same monetary policy. It is shown that for low discount factors and sufficiently correlated shocks welfare in the union is higher than that achievable when countries coordinate while retaining their own independent policy. Optimal policy, when participation in the union is voluntary, is characterized and shown to respond to agents’ incentives to leave by tilting current and future policy in their favour. This contrasts with the static nature of optimal policy when participation is exogenously assumed. This finding implies that policy in the union will not be exclusively guided by area-wide developments but will occasionally take account of member countries’ national developments. Finally, we show that there might exist states of the world in which the union breaks apart, as occurred in several historical episodes. The Paper thus provides a first formal analysis of the forces behind the formation, sustainability and disruption of a monetary union.
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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number
4122.
Find related papers by JEL classification: C70 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - General E50 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - General F33 - International Economics - - International Finance - - - International Monetary Arrangements and Institutions
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Alberto Alesina & Robert J. Barro, 2000.
"Currency Unions,"
NBER Working Papers
7927, National Bureau of Economic Research, Inc.
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