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Robust Control Rules to Shield Against Indeterminacy

  • Nicoletta Batini
  • Paul Levine

We address robustness of inflation targeting rules in a New Keynesian model using two approaches. Firstly we use the Hansen-Sargent method, borrowed from the control theory literature, to design robust rules on the basis of the policymaker playing a game against malign nature. This welfare-based approach is intended to deal with worst case scenarios, but does not directly address stability robustness. Furthermore, in the case of forward-looking systems, it does not address indeterminacy robustness; thus a system may have good stability properties, but a small parameter change could lead to indeterminacy. Secondly, we address this latter issue by imposing a probability distribution on problematic parameters, and investigate both the probability of instability and the probability of indeterminacy of the robust rule. For comparison, we apply the same idea to inflation forecast based rules, which have the potential to perform well provided that there is enough interest rate smoothing and that the forecast horizon is not too far ahead

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Paper provided by Society for Computational Economics in its series Computing in Economics and Finance 2004 with number 339.

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Date of creation: 11 Aug 2004
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Handle: RePEc:sce:scecf4:339
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  1. Levin, Andrew & Wieland, Volker & Williams, John C., 2003. "The performance of forecast-based monetary policy rules under model uncertainty," CFS Working Paper Series 2003/06, Center for Financial Studies (CFS).
  2. Taylor, John B., 2000. "Low inflation, pass-through, and the pricing power of firms," European Economic Review, Elsevier, vol. 44(7), pages 1389-1408, June.
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  7. Ryan Banerjee & Nicoletta Batini, 2003. "UK Consumers’ Habits," Discussion Papers 13, Monetary Policy Committee Unit, Bank of England.
  8. Nelson, Edward & Nikolov, Kalin, 2002. "Monetary Policy and Stagflation in the UK," CEPR Discussion Papers 3458, C.E.P.R. Discussion Papers.
  9. Coenen, Gunter, 2007. "Inflation persistence and robust monetary policy design," Journal of Economic Dynamics and Control, Elsevier, vol. 31(1), pages 111-140, January.
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  12. Efrem Castelnuovo, 2003. "Taylor Rules and Interest Rate Smoothing in the US and EMU," Macroeconomics 0303002, EconWPA.
  13. Walsh, Carl E., 2004. "Implications of a Changing Economic Structure for the Strategy of Monetary Policy," Santa Cruz Center for International Economics, Working Paper Series qt84g1q1g6, Center for International Economics, UC Santa Cruz.
  14. Nicoletta Batini & Joseph Pearlman, 2002. "Too Much Too Soon: Instability and Indeterminacy with Forward-Looking Rules," Discussion Papers 08, Monetary Policy Committee Unit, Bank of England.
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  19. repec:cup:macdyn:v:6:y:2002:i:1:p:111-44 is not listed on IDEAS
  20. Malcolm D. Knight & Chair, 2003. "Implications of a changing economic structure for the strategy of monetary policy," Proceedings - Economic Policy Symposium - Jackson Hole, Federal Reserve Bank of Kansas City, pages 361-371.
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  23. Juillard, Michel & Karam, Philippe & Laxton, Douglas & Pesenti, Paolo, 2006. "Welfare-based monetary policy rules in an estimated DSGE model of the US economy," Working Paper Series 0613, European Central Bank.
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