 Learning, Heterogeneity, and Complexity in the New Keynesian ModelRobert Calvert Jump, Cars Hommes and Paul Levine () Working Papers from Department of Accounting, Economics and Finance, Bristol Business School, University of the West of England, Bristol Abstract: We present a New Keynesian model in which a fraction n of agents are fully rational, and a fraction 1 − n of agents are bounded rational. After deriving a simple reduced form, we demonstrate that the Taylor condition is sufficient for determinacy and stability, both when the proportion of fully rational agents is held fixed, and when it is allowed to vary according to reinforcement learning. However, this result relies on the absence of persistence in the monetary policy rule, and we demonstrate that the Taylor condition is not sufficient for determinacy and stability in the presence of interest rate smoothing. For monetary policy rules that imply indeterminacy, we demonstrate the existence of limit cycles via Hopf bifurcation, and explore a rational route to randomness numerically. Our results support the broader literature on behavioural New Keynesian models, in which the Taylor condition is known to be a useful guide to monetary policy, despite not always being sufficient for determinacy and/or stability. Date: 2018-01-07 Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:uwe:wpaper:20181807 Access Statistics for this paper More papers in Working Papers from Department of Accounting, Economics and Finance, Bristol Business School, University of the West of England, Bristol Contact information at EDIRC. |
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