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- handle: 10670/1.sxcghj
- hal: hal-04315922
- doi: 10.1086/725170
- WOS: 001086506000001
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info:eu-repo/semantics/altIdentifier/doi/10.1086/725170
info:eu-repo/semantics/OpenAccess
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Public debt Sovereign debt National debts Government debts Debts, Government Public debtsCiter ce document
George-Marios Angeletos et al., « Public debt as private liquidity: optimal policy », HAL-SHS : économie et finance, ID : 10.1086/725170
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We study optimal policy in an economy where interest rates are low because public debt serves as collateral or buffer stock. Issuing more public debt raises welfare by easing the underlying friction but also reduces the private valuation of this service, raising interest rates. This trade-off shapes the optimal quantity of public debt in the long run, justifies a departure from tax smoothing in the short run, and calls for larger deficits during financial crises. Our analysis illustrates the possible robustness of these insights to different microfoundations and helps clarify when exactly low interest rates represent an opportunity for cheap government borrowing.