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Financial Frictions, Bubbles, and Macroprudential Policies

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  • Alexis Derviz

Abstract

We explore the ability of a macroprudential policy instrument to dampen the consequences of equity mispricing (a bubble) and the correction thereof (the bubble bursting), as well as the consequences for real activity in a production economy. In our model, producers are financed by both bank debt and equity, and face a mix of systemic and idiosyncratic uncertainty. Positive/negative bubbles arise when prior public beliefs about the aggregate productivity of producers (business sentiment) become biased upwards/downwards. Economic activity in equilibrium is influenced by the bubble size in conjunction with agency problems caused by delegation of lending to relationship bankers. The presence of macroprudential policy is manifested in a convex dependence of bank capital requirements on the quantity of uncollateralized credit. We find that this kind of policy is more successful in suppressing equity price swings than moderating output fluctuations. At the same time, economic activity recoils substantially with the introduction of a macroprudential instrument, so that its presence is likely to entail tangible welfare costs. In this regard, fine-tuning capital charges as a function of corporate governance on the borrower side (specifically, by discouraging limited liability of borrowing firm managers) would be less costly than placing the full burden of prudential regulation on the lender side.

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Bibliographic Info

Paper provided by Czech National Bank, Research Department in its series Working Papers with number 2011/04.

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Date of creation: Sep 2011
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Handle: RePEc:cnb:wpaper:2011/04

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Keywords: Asset price; bank; bubble; credit; macroprudential policy.;

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  1. Kosuke Aoki & James Proudman & Gertjan Vlieghe, 2002. "House prices, consumption, and monetary policy: a financial accelerator approach," Bank of England working papers 169, Bank of England.
  2. Murillo Campello & John Graham & Campbell R. Harvey, 2009. "The Real Effects of Financial Constraints: Evidence from a Financial Crisis," NBER Working Papers 15552, National Bureau of Economic Research, Inc.
  3. Dell'Ariccia, Giovanni & Marquez, Robert, 2004. "Information and bank credit allocation," Journal of Financial Economics, Elsevier, vol. 72(1), pages 185-214, April.
  4. Bernanke, Ben S. & Gertler, Mark & Gilchrist, Simon, 1999. "The financial accelerator in a quantitative business cycle framework," Handbook of Macroeconomics, in: J. B. Taylor & M. Woodford (ed.), Handbook of Macroeconomics, edition 1, volume 1, chapter 21, pages 1341-1393 Elsevier.
  5. William Curt Hunter & George G. Kaufman & Michael Pomerleano (ed.), 2005. "Asset Price Bubbles: The Implications for Monetary, Regulatory, and International Policies," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262582538, December.
  6. Matteo Iacoviello, 2005. "House Prices, Borrowing Constraints, and Monetary Policy in the Business Cycle," American Economic Review, American Economic Association, vol. 95(3), pages 739-764, June.
  7. Claudio E. V. Borio, 2003. "Towards a macroprudential framework for financial supervision and regulation?," BIS Working Papers 128, Bank for International Settlements.
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