G2TT
来源类型Discussion paper
规范类型论文
来源IDDP8764
DP8764 Aggregate Investment Externalities and Macroprudential Regulation
Jean Charles Rochet; Hans Gersbach
发表日期2012
出版年2012
语种英语
摘要Evidence suggests that banks tend to lend a lot during booms, and very little during recessions. We propose a simple explanation for this phenomenon. We show that, instead of dampening productivity shocks, the banking sector tends to exacerbate them, leading to excessive fluctuations of credit, output and asset prices. Our explanation relies on three ingredients that are characteristic of modern banks' activities. The first ingredient is moral hazard: banks are supposed to monitor the small and medium sized enterprises that borrow from them, but they may shirk on their monitoring activities, unless they are given sufficient informational rents. These rents limit the amount that investors are ready to lend them, to a multiple of the banks' own capital. The second ingredient is the banks' high exposure to aggregate shocks: banks' assets have positively correlated returns. Finally the third ingredient is the ease with which modern banks can reallocate capital between different lines of business. At the competitive equilibrium, banks offer privately optimal contracts to their investors but these contracts are not socially optimal: banks' decisions of reallocating capital react too strongly to aggregate shocks. This is because banks do not internalize the impact of their decisions on asset prices. This generates excessive fluctuations of credit, output and asset prices. We examine the efficacy of several possible policy responses to these properties of credit markets, and derive a rationale for macroprudential regulation.
主题Financial Economics ; International Macroeconomics
关键词Bank credit fluctuations Investment externalities Macroprudential regulation
URLhttps://cepr.org/publications/dp8764
来源智库Centre for Economic Policy Research (United Kingdom)
资源类型智库出版物
条目标识符http://119.78.100.153/handle/2XGU8XDN/537600
推荐引用方式
GB/T 7714
Jean Charles Rochet,Hans Gersbach. DP8764 Aggregate Investment Externalities and Macroprudential Regulation. 2012.
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