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Optimal policy for macro-financial stability

  • Gianluca Benigno
  • Huigang Chen
  • Chris Otrok
  • Alessandro Rebucci
  • Eric Young

In this paper we study whether policy makers should wait to intervene until a financial crisis strikes or rather act in a preemptive manner. We study this question in a relatively simple dynamic stochastic general equilibrium model in which crises are endogenous events induced by the presence of an occasionally binding borrowing constraint as in Mendoza (2010). First, we show that the same set of taxes that replicates the constrained social planner allocation could be used optimally by a Ramsey planner to achieve the first best unconstrained equilibrium: in both cases without any precautionary intervention. Second, we show that the extent to which policymakers should intervene in a preemptive manner depends critically on the set of policy tools available and what these instruments can achieve when a crisis strikes. For example, in the context of our model, we find that, if the policy tools is constrained so that the first best cannot be achieved and the policy make r has access to only one tax instrument, it is always desirable to intervene before the crisis regardless of the instrument used. If however the policy maker has access to two instruments, it is optimal to act only during crisis times. Third and finally, we propose a computational algorithm to solve Markov-Perfect optimal policy for problems in which the policy function is not differentiable.

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Paper provided by London School of Economics and Political Science, LSE Library in its series LSE Research Online Documents on Economics with number 51519.

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Length: 50 pages
Date of creation: 2012
Date of revision:
Handle: RePEc:ehl:lserod:51519
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  1. Klaus Adam & Roberto M. Billi, 2005. "Optimal monetary policy under commitment with a zero bound on nominal interest rates," Research Working Paper RWP 05-07, Federal Reserve Bank of Kansas City.
  2. Fabio Braggion & Lawrence J. Christiano & Jorge Roldos, 2007. "Optimal Monetary Policy in a 'Sudden Stop'," NBER Working Papers 13254, National Bureau of Economic Research, Inc.
  3. Bianchi, Javier, 2009. "Overborrowing and Systemic Externalities in the Business Cycle," MPRA Paper 16270, University Library of Munich, Germany.
  4. Klaus Adam & Roberto M. Billi, 2005. "Discretionary monetary policy and the zero lower bound on nominal interest rates," Research Working Paper RWP 05-08, Federal Reserve Bank of Kansas City.
  5. Paul Krugman, 1999. "Balance Sheets, the Transfer Problem, and Financial Crises," International Tax and Public Finance, Springer, vol. 6(4), pages 459-472, November.
  6. Timothy J. Kehoe & Kim Ruhl, 2008. "Data Appendix to "Are Shocks to the Terms of Trade Shocks to Productivity?"," Technical Appendices 07-40, Review of Economic Dynamics.
  7. Gianluca Benigno & Huigang Chen & Christopher Otrok & Alessandro Rebucci & Eric R. Young, 2012. "Capital controls or exchange rate policy? A pecuniary externality perspective," LSE Research Online Documents on Economics 51505, London School of Economics and Political Science, LSE Library.
  8. Guillermo A. Calvo & Alejandro Izquierdo & Luis Fernando Mejía, 2008. "Systemic Sudden Stops: The Relevance of Balance-Sheet Effects and Financial Integration," Research Department Publications 4581, Inter-American Development Bank, Research Department.
  9. Reinhart, Carmen & Ostry, Jonathan, 1992. "Saving and Terms of Trade Shocks: Evidence from Developing Countries," MPRA Paper 6976, University Library of Munich, Germany.
  10. Gianluca Benigno & Huigang Chen & Christopher Otrok & Alessandro Rebucci & Eric R. Young, 2011. "Financial Crises and Macro-Prudential Policies," IDB Publications (Working Papers) 27738, Inter-American Development Bank.
  11. Luis Felipe Céspedes & Roberto Chang & Andrés Velasco, 2012. "Financial Intermediation, Exchange Rates, and Unconventional Policy in an Open Economy," NBER Working Papers 18431, National Bureau of Economic Research, Inc.
  12. Kim, Sunghyun Henry & Kollmann, Robert & Kim, Jinill, 2010. "Solving the incomplete market model with aggregate uncertainty using a perturbation method," Journal of Economic Dynamics and Control, Elsevier, vol. 34(1), pages 50-58, January.
  13. Krusell, Per, 2002. "Time-consistent redistribution," European Economic Review, Elsevier, vol. 46(4-5), pages 755-769, May.
  14. Olivier Jeanne & Romain Rancière, 2011. "The Optimal Level of International Reserves For Emerging Market Countries: A New Formula and Some Applications," Economic Journal, Royal Economic Society, vol. 121(555), pages 905-930, 09.
  15. Timothy J. Kehoe & David K. Levine, 1993. "Debt-Constrained Asset Markets," Review of Economic Studies, Oxford University Press, vol. 60(4), pages 865-888.
  16. Enrique G. Mendoza, 2010. "Sudden Stops, Financial Crises, and Leverage," American Economic Review, American Economic Association, vol. 100(5), pages 1941-66, December.
  17. Lane, Philip R. & Milesi-Ferretti, Gian Maria, 2007. "The external wealth of nations mark II: Revised and extended estimates of foreign assets and liabilities, 1970-2004," Journal of International Economics, Elsevier, vol. 73(2), pages 223-250, November.
  18. Wilbur John Coleman, 1989. "Equilibrium in a production economy with an income tax," International Finance Discussion Papers 366, Board of Governors of the Federal Reserve System (U.S.).
  19. Timothy J. Kehoe & Kim J. Ruhl, 2007. "Are shocks to the terms of trade shocks to productivity?," Staff Report 391, Federal Reserve Bank of Minneapolis.
  20. Enrique G. Mendoza & Javier Bianchi, 2010. "Overborrowing, financial crises and ‘macro-prudential’ taxes," Proceedings, Federal Reserve Bank of San Francisco, issue Oct.
  21. repec:oup:restud:v:60:y:1993:i:4:p:865-88 is not listed on IDEAS
  22. repec:oup:restud:v:48:y:1981:i:2:p:289-309 is not listed on IDEAS
  23. Mendoza, Enrique G, 1991. "Real Business Cycles in a Small Open Economy," American Economic Review, American Economic Association, vol. 81(4), pages 797-818, September.
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