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Optimal monetary policy in a model of the credit channel

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  • De Fiore, Fiorella
  • Tristani, Oreste

Abstract

We consider a simple extension of the basic new-Keynesian setup in which we relax the assumption of frictionless financial markets. In our economy, asymmetric information and default risk lead banks to optimally charge a lending rate above the risk-free rate. Our contribution is threefold. First, we derive analytically the loglinearised equations which characterise aggregate dynamics in our model and show that they nest those of the new- Keynesian model. A key difference is that marginal costs increase not only with the output gap, but also with the credit spread and the nominal interest rate. Second, we find that financial market imperfections imply that exogenous disturbances, including technology shocks, generate a trade-off between output and inflation stabilisation. Third, we show that, in our model, an aggressive easing of policy is optimal in response to adverse financial market shocks. JEL Classification: E52, E44

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Bibliographic Info

Paper provided by European Central Bank in its series Working Paper Series with number 1043.

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Date of creation: Apr 2009
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Handle: RePEc:ecb:ecbwps:20091043

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Keywords: Asymmetric information; financial markets; optimal monetary policy;

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  1. Fiorella De Fiore & Oreste Tristani, 2011. "Credit and the Natural Rate of Interest," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 43, pages 407-440, 03.
  2. Smets, Frank & Wouters, Raf, 2007. "Shocks and frictions in US business cycles: a Bayesian DSGE approach," Working Paper Series 0722, European Central Bank.
  3. Ben Bernanke & Mark Gertler & Simon Gilchrist, 1998. "The Financial Accelerator in a Quantitative Business Cycle Framework," NBER Working Papers 6455, National Bureau of Economic Research, Inc.
  4. Townsend, Robert M., 1979. "Optimal contracts and competitive markets with costly state verification," Journal of Economic Theory, Elsevier, vol. 21(2), pages 265-293, October.
  5. Lawrence J. Christiano & Martin Eichenbaum, 1992. "Liquidity effects and the monetary transmission mechanism," Staff Report 150, Federal Reserve Bank of Minneapolis.
  6. Tommaso Monacelli & Ester Faia, 2005. "Optimal Interest Rate Rules, Asset Prices and Credit Frictions," Computing in Economics and Finance 2005 452, Society for Computational Economics.
  7. Andrew T. Levin & Fabio M. Natalucci & Egon Zakrajsek, 2004. "The magnitude and cyclical behavior of financial market frictions," Finance and Economics Discussion Series 2004-70, Board of Governors of the Federal Reserve System (U.S.).
  8. Ravenna, Federico & Walsh, Carl E., 2006. "Optimal monetary policy with the cost channel," Journal of Monetary Economics, Elsevier, vol. 53(2), pages 199-216, March.
  9. Ester Faia, 2008. "Optimal Monetary Policy with Credit Augmented Liquidity Cycles," 2008 Meeting Papers 414, Society for Economic Dynamics.
  10. Timothy S. Fuerst & Charles T. Carlstrom, 1998. "Agency costs and business cycles," Economic Theory, Springer, vol. 12(3), pages 583-597.
  11. Charles T. Carlstrom & Timothy S. Fuerst, 1996. "Agency costs, net worth, and business fluctuations: a computable general equilibrium analysis," Working Paper 9602, Federal Reserve Bank of Cleveland.
  12. Christiano, Lawrence & Ilut, Cosmin & Motto, Roberto & Rostagno, Massimo, 2008. "Monetary policy and stock market boom-bust cycles," Working Paper Series 0955, European Central Bank.
  13. Glenn D. Rudebusch, 2006. "Monetary Policy Inertia: Fact or Fiction?," International Journal of Central Banking, International Journal of Central Banking, vol. 2(4), December.
  14. Gale, Douglas & Hellwig, Martin, 1985. "Incentive-Compatible Debt Contracts: The One-Period Problem," Review of Economic Studies, Wiley Blackwell, vol. 52(4), pages 647-63, October.
  15. Gilchrist, Simon & Leahy, John V., 2002. "Monetary policy and asset prices," Journal of Monetary Economics, Elsevier, vol. 49(1), pages 75-97, January.
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