Credibility and Time Inconsistency in a Stochastic World
AbstractThis paper re-examines the issue of the credibility and sustainability of optimal policies derived from Pontryagin's Maximum Principle and generally regarded as time-inconsistent, in models with forward-looking rational expectations. Specifically, it considers the behaviour of such models in the presence of continuing stochastic noise. This is shown to convert the policy problem from a one-shot dynamic policy game to a continuing game, giving governments an incentive to invest in a reputation for not reneging on the full optimal rule. This incentive may, in certain circumstances, render the full optimal rule credible and therefore sustainable. It is demonstrated that a sufficiently low degree of discounting on the part of government, or a sufficiently high variance of shocks (measured relative to the initial displacement) ensures the sustainability of the full optimal rule. Using a simple dynamic open economy model, these conditions are shown to be plausible unless the discount rate is very high.
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Bibliographic InfoPaper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 94.
Date of creation: Feb 1986
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- Levine, Paul & Pearlman, Joseph, 2011. "Computation of LQ Approximations to Optimal Policy Problems in Different Information Settings under Zero Lower Bound Constraints," Dynare Working Papers 10, CEPREMAP.
- Kilponen, Juha, 2004.
"Robust expectations and uncertain models – A robust control approach with application to the New Keynesian economy,"
Research Discussion Papers
5/2004, Bank of Finland.
- Juha Kilponen, 2004. "Robust expectations and uncertain models – A robust control approach with application to the New Keynesian economy," GE, Growth, Math methods 0404004, EconWPA.
- M. Isabel García Gracia, 1995. "El SME: un modelo de comportamiento asimétrico," Estudios de Economía Aplicada, Estudios de Economía Aplicada, vol. 3, pages 41-68, Junio.
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