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Learning, Stabilization and Credibility: Optimal Monetary Policy in a Changing Economy

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  • Guenter W. Beck and Volker Wieland

Abstract

This paper investigates optimal monetary policy in an economy, in which the output-inflation trade off faced by the central bank is influenced by two important forces: (i) the presence of uncertain and possibly changing parameters, and (ii) private sector expectations regarding the central bank's policy. Beliefs regarding the uncertain and possibly time-varying parameters are normal distributions, and are updated according to Bayes rule. Optimal decisions by the central bank involve a certain degree of experimentation. We approximate optimal policies and payoffs using numerical dynamic programming methods and investigate how the incentive for experimentation varies with the extent of parameter uncertainty regarding the short-run slope of the Phillips curve and the weight given to forward-looking private sector expectations in inflation determination. Preliminary findings suggest that the central bank will be willing to repeatedly undertake costly experiments. In other words, the policymaker will tolerate some level of steady-state fluctuations, because they provide information about policy tradeoffs.

Suggested Citation

  • Guenter W. Beck and Volker Wieland, 2001. "Learning, Stabilization and Credibility: Optimal Monetary Policy in a Changing Economy," Computing in Economics and Finance 2001 162, Society for Computational Economics.
    • Handle: RePEc:sce:scecf1:162
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    Citations

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    Cited by:

    1. Robert Tetlow & Peter von zur Muehlen, 2004. "Avoiding Nash Inflation: Bayesian and Robus Responses to Model Uncertainty," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 7(4), pages 869-899, October.
    2. Kendrick, David A., 2005. "Stochastic control for economic models: past, present and the paths ahead," Journal of Economic Dynamics and Control, Elsevier, vol. 29(1-2), pages 3-30, January.

    More about this item

    Keywords

    Bayesian Learning; Optimal control with unknown paramters; Learning by Doing; Dynamic Programming;
    All these keywords.

    JEL classification:

    • C60 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - General
    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy

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