Liquidity and Ambiguity: Banks or Asset Markets?
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This paper studies the impact of incalculable risk (i.e. ambiguity) on two alternative institutional arrangements for financial intermediation in an economy where consumers face uncertain liquidity needs. The ambiguity the consumers experience is modeled by their degree of confidence in their additive beliefs. The optimal liquidity allocation and two institutional arrangements for implementing this allocation are analyzed: a secondary asset market and a competitive banking sector. For full confidence we obtain the well-known result that consumers prefer the deposit contract offered in the competitive banking sector over the asset market, since the former can provide the optimal cross subsidy for consumers with high liquidity needs. With increasing ambiguity this preference will be reversed: the asset market is preferred, since it avoids inefficient liquidation if the bank reserve holdings turn out to be suboptimal.
keywordsFinancial institutions, Liquidity, Incalculable risk, Ambiguity, Choquet Expected UtilityAuthors biographyJürgen Eichberger, Alfred Weber Institute, Department of Economics - University of Heidelberg - Bergheimer Straße 58, DE-69115, Germany. Email: juergen.eichberger@awi.uni-heidelberg.de.Willy Spanjers, Department of Economics, School of Law, Social and Behavioural Sciences - Kingston University - Penrhyn Road, Kingston upon Thames, KT1 2EE, United Kingdom. Email: w.spanjers@kingston.ac.uk. |
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