Asset prices, debt constraints and inefficiency |
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Authors: | Gaetano Bloise Pietro Reichlin |
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Institution: | a Department of Economics, University of Rome III, 77 Via Silvio D?Amico, I-00145 Rome, Italy b Department of Economics, LUISS ‘Guido Carli’, 32 Viale Romania, I-00198 Rome, Italy c CEPR, United Kingdom d EIEF, Italy |
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Abstract: | We consider (possibly non-stationary) economies with endogenous solvency constraints under uncertainty over an infinite horizon, as in Alvarez and Jermann (2000) 5]. A sort of Cass Criterion (Cass, 1972 10]) completely characterizes constrained inefficiency under the hypothesis of uniform gains from risk-sharing (which is always satisfied in stationary economies when the autarchy is constrained inefficient). Uniform gains from risk-sharing also guarantee a finite value of the intertemporal aggregate endowment at a constrained optimum. Hence, no equilibrium exhibits a null interest rate in the long run. Finally, constrained inefficiency occurs if and only if there exists a feasible redistribution producing a welfare improvement at all contingencies. |
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Keywords: | D50 D52 D61 E44 G13 |
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