Nonlinear Phillips Curves, Complex Dynamics and Monetary Policy in a Keynesian Macro Model
In the framework of a Keynesian monetary macro model we study implications of kinked Phillips curves and alternative monetary policy rules. As alternative monetary policy rules we consider monetary growth targeting and interest rate targeting (the Taylor rule). Our monetary macro model exhibits: asset market clearing, disequilibrium in product and labor markets, sluggish price and quantity adjustments, two Phillips-Curves for wage and price dynamics, and a combination of medium-run adaptive and short-run forward looking expectations. Simulations of the model with our estimated parameters reveal global instability of its steady state. We show that monetary policy can stabilize the dynamics to some extent and that, in addition, an institutionally given kink in the money wage Phillips-Curve (downwardly rigid wages) represents a powerful mechanism for getting bounded, more or less irregular fluctuations in the place of purely explosive ones. The resulting fluctuations can be reduced in their size by choosing the parameters of monetary policy within a certain corridor, the exact position of which may however be very uncertain.
|Date of creation:||01 Oct 2002|
|Date of revision:|
|Publication status:||Published as: Chiarella, C., Flaschel, P., Gong, G. and Semmler, E., 2003, "Nonlinear Phillips Curves, Complex Dynamics and Monetary Policy in a Keynesian Macro Model", Chaos, Solitons & Fractals, 18(3), 613-634.|
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