Discretionary Policy in a Monetary Union with Sovereign Debt

Campbell Leith and Simon Wren-Lewis

No 2010-74, SIRE Discussion Papers from Scottish Institute for Research in Economics (SIRE)

Abstract: This paper examines the interactions between multiple national fiscal policy- makers and a single monetary policy maker in response to shocks to government debt in some or all of the countries of a monetary union. We assume that national governments respond to excess debt in an optimal manner, but that they do not have access to a commitment technology. This implies that national fi scal policy gradually reduces debt: the lack of a commitment technology precludes a random walk in steady state debt, but the need to maintain national competitiveness avoids excessively rapid debt reduction. If the central bank can commit, it adjusts its policies only slightly in response to higher debt, allowing national fiscal policy to undertake most of the adjustment. However if it cannot commit, then optimal monetary policy involves using interest rates to rapidly reduce debt, with signifi cant welfare costs. We show that in these circumstances the central bank would do better to ignore national fiscal policies in formulating its policy.

Date: 2010
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Journal Article: Discretionary policy in a monetary union with sovereign debt (2011)
Working Paper: Discretionary policy in a monetary union with sovereign debt (2010)
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Persistent link: https://EconPapers.repec.org/RePEc:edn:sirdps:203

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