Pecuniary externalities, bank overleverage, and macroeconomic fragility

Pecuniary externalities, bank overleverage, and macroeconomic fragility
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货币外部性、银行杠杆过高和宏观经济脆弱性

DOI:
10.1111/ijet.12325
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发表时间:
2021
影响因子:
0.5
通讯作者:
Tsuruga Takayuki
Tsuruga Takayuki
中科院分区:
经济学4区
文献类型:
--
作者:
Kato Ryo;Tsuruga Takayuki

文献摘要

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金融摩擦模型中的货币外部性证明了宏观审慎政策的合理性,以防止经济行为主体过度冒险。我们扩展了钻石和拉詹模型的银行与生产要素,并探讨如何影响银行的财务外部性的杠杆作用。我们表明,在我们的模型中,自由放任的银行承担过度的风险相比,约束的社会最优。我们的数值模拟表明,在自由放任经济中,危机发生的概率比在有约束的社会最优经济中高出2-3个百分点。
Pecuniary externalities in models with financial friction justify macroprudential policies for preventing excessive risk taking by economic agents. We extend the Diamond and Rajan model of banks with production factors and explore how a pecuniary externality affects a bank's leverage. We show that the laissez‐faire banks in our model take on excessive risks compared with the constrained social optimum. Our numerical simulations suggest that the crisis probability is 2–3 percentage points higher in the laissez‐faire economy than in the constrained social optimum.