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Creator: Bengui, Julien and Bianchi, Javier Series: Working paper (Federal Reserve Bank of Minneapolis. Research Department) Number: 754 Abstract:
The outreach of macroprudential policies is likely limited in practice by imperfect regulation enforcement, whether due to shadow banking, regulatory arbitrage, or other regulation circumvention schemes. We study how such concerns affect the design of optimal regulatory policy in a workhorse model in which pecuniary externalities call for macroprudential taxes on debt, but with the addition of a novel constraint that financial regulators lack the ability to enforce taxes on a subset of agents. While regulated agents reduce risk taking in response to debt taxes, unregulated agents react to the safer environment by taking on more risk. These leakages undermine the effectiveness of macroprudential taxes but do not necessarily call for weaker interventions. A quantitative analysis of the model suggests that aggregate welfare gains and reductions in the severity and frequency of financial crises remain, on average, largely unaffected by even significant leakages.
Mot-clé: Regulatory arbitrage, Macroprudential policy, Financial crises, and Limited regulation enforcement Assujettir: F32 - Current Account Adjustment; Short-term Capital Movements, E44 - Financial Markets and the Macroeconomy, E32 - Business Fluctuations; Cycles, F41 - Open Economy Macroeconomics, and D62 - Externalities
Creator: Arce, Fernando, Bengui, Julien, and Bianchi, Javier Series: Working paper (Federal Reserve Bank of Minneapolis. Research Department) Number: 761 Abstract:
This paper proposes a theory of foreign reserves as macroprudential policy. We study an open economy model of financial crises, in which pecuniary externalities lead to over-borrowing, and show that by accumulating international reserves, the government can achieve the constrained-efficient allocation. The optimal reserve accumulation policy leans against the wind and significantly reduces the exposure to financial crises. The theory is consistent with the joint dynamics of private and official capital flows, both over time and in the cross section, and can quantitatively account for the recent upward trend in international reserves.
Mot-clé: Macroprudential policy, Financial crises, and International reserves Assujettir: E00 - Macroeconomics and Monetary Economics: General, F00 - International Economics: General, and G00 - Financial Economics: General
Creator: Bengui, Julien, Bianchi, Javier, and Coulibaly, Louphou Series: Staff report (Federal Reserve Bank of Minneapolis. Research Department) Number: 535 Abstract:
In this paper, we study the optimal design of financial safety nets under limited private credit. We ask when it is optimal to restrict ex ante the set of investors that can receive public liquidity support ex post. When the government can commit, the optimal safety net covers all investors. Introducing a wedge between identical investors is inefficient. Without commitment, an optimally designed financial safety net covers only a subset of investors. Compared to an economy where all investors are protected, this results in more liquid portfolios, better social insurance, and higher ex ante welfare. Our result can rationalize the prevalent limited coverage of safety nets, such as the lender of last resort facilities.
Mot-clé: Public liquidity provision, Bailouts, Time inconsistency, and Safety nets Assujettir: G28 - Financial Institutions and Services: Government Policy and Regulation, E58 - Central Banks and Their Policies, and E61 - Policy Objectives; Policy Designs and Consistency; Policy Coordination