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Time vs. Risk Preferences, Bank Liquidity Provision and Financial Fragility

Authors 
Ano de Divulgação 
2019
Código JEL 
D81 - Criteria for Decision-Making under Risk and Uncertainty
G21 - Banks; Other Depository Institutions; Mortgages
G28 - Government Policy and Regulation
Resumo 
How important is it to distinguish relative risk aversion (RRA) from the intertemporal elasticity of substitution (IES) to understand bank liquidity provision and financial fragility? To answer this question, I develop a banking theory in which depositors feature Epstein-Zin preferences. In equilibrium, banks provide liquidity when RRA is sufficiently high (low) only for IES larger (smaller) than 1. Under the same conditions, banks might be fragile, i.e. subject to possible self-fulfilling depositors' runs. A time-consistent deposit freeze resolves banks' fragility if RRA is sufficiently low and IES is sufficiently larger than 1.
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