Capturing Macroprudential Regulation Effectiveness: A DSGE Approach with Shadow Intermediaries (with Abdelaziz Rouabah)
This version: May 2018.First version: Banque centrale du Luxembourg Working Paper No. 2017/114
We develop a New Keynesian DSGE model with heterogeneous agents to investigate how the shadow financial system affects macroeconomic activity and financial stability. In the adopted framework, regulated commercial banks finance small firms through traditional business loans and exert costly effort to screen the projects they finance. Shadow financial intermediaries finance large firms, provide short-term lending to commercial banks, and are engaged in the secondary market for loans. In this market, commercial banks originate asset-backed securities under moral hazard to exploit regulatory arbitrage. Shadow intermediaries purchase these loans from commercial banks under adverse selection. In general equilibrium, this set of externalities is not internalized by the financial system. We show that a macroprudential authority may successfully mitigate the externalities by activating caps to both the leverage ratio and the securitization ratio in the traditional banking sector. Such policy actions are effective in dampening aggregate volatility and safeguarding financial stability.
Work in progress
Households Heterogeneity over the Business Cycle
Investment Funds and Liquidity
Financial Deepening and Macroeconomic Volatility [available upon request]
Firm Turnover and Unemployment Fluctuations [available upon request]