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Optimal Time-Consistent Macroprudential Policy
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DOI：10.1086/696280.png)
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Abstract
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Collateral constraints widely used in models of financial crises feature a pecuniary externality: Agents do not internalize how borrowing decisions made in good times affect collateral prices during a crisis. We show that under commitment the optimal financial regulator's plans are time inconsistent and study time-consistent policy. Quantitatively, this policy reduces sharply the frequency and magnitude of crises, removes fat tails from the distribution of asset returns, and increases social welfare. In contrast, constant debt taxes are ineffective and can be welfare reducing, while an optimized macroprudential Taylor rule is effective but less so than the optimal time-consistent policy.
Keywords:
SUDDEN STOPS
FINANCIAL CRISES
INVESTMENT
CAPACITY
MODEL
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