Julien Bengui

Département de sciences économiques
Université de Montréal
C.P. 6128, succursale Centre-ville
Montréal QC H3C 3J7

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Institutional Affiliation: Université de Montréal

NBER Working Papers and Publications

September 2018Macroprudential Policy with Leakages
with Javier Bianchi: w25048
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 macruprudential taxes but do not necessarily call for weaker interventions. A quantitative analysis of the mode...
September 2016Financial Safety Nets
with Javier Bianchi, Louphou Coulibaly: w22594
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.

Published: Julien Bengui & Javier Bianchi & Louphou Coulibaly, 2019. "FINANCIAL SAFETY NETS," International Economic Review, vol 60(1), pages 105-132. citation courtesy of

September 2012Capital Mobility and International Sharing of Cyclical Risk
with Enrique G. Mendoza, Vincenzo Quadrini: w18372
This paper investigates whether the international globalization of financial markets allows for significant cross-country risk-sharing at the business cycle frequency. We find that cross-country risk-sharing is still limited and this is unlikely to be the result of financial frictions that limit state-contingent contracts. Part of the limited international risk sharing could be the consequence of frictions that de-facto reduce the short-term mobility of financial capital. But even with these frictions we find significant divergence between model predictions and the data.

Published: Bengui, Julien & Mendoza, Enrique G. & Quadrini, Vincenzo, 2013. "Capital mobility and international sharing of cyclical risk," Journal of Monetary Economics, Elsevier, vol. 60(1), pages 42-62. citation courtesy of

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