Optimal Sovereign Debt Default

Adam, Klaus ; Grill, Michael

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URL: https://ub-madoc.bib.uni-mannheim.de/30180
URN: urn:nbn:de:bsz:180-madoc-301807
Document Type: Working paper
Year of publication: 2011
Place of publication: Mannheim
Publication language: English
Institution: School of Law and Economics > Geldpolitik und Makroökonomik (Adam 2008-)
Subject: 330 Economics
Classification: JEL: JEL Class. No.: E62, F34,
Abstract: We determine optimal government default policies for a small open economy in which a domestic government can borrow internationally by issuing non-contingent debt contracts. Unlike earlier work, we consider optimal default policies under full government commitment and treat repayment of international debt as a decision variable. Default can be optimal under commitment because it allows for increased international diversification of domestic output and consumption risk when government bond markets are incomplete. In the absence of default costs, default optimally occurs very frequently and independently of the country´s net foreign asset position. Optimal default policies, however, change drastically when a government default entails small but positive dead weight costs: default is then optimal only in response to disaster-like shocks to domestic output, or when a small adverse shock pushes international debt levels su¢ ciently close to the country´s borrowing limit. Optimal default policies increase welfare significantly compared to a situation where default is ruled out by assumption, even for sizable default costs. For such ciently low level of default costs the optimal default policies can approximately be replicated by issuing a simple equity-like government bond.

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