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Keynesian Macrodynamics: Convergence, Roads to Instability and the Emergence of Complex Business Fluctuations

We reformulate the traditional AS-AD growth model, with a Taylor policy rule replacing the conventional LM-curve. The essential features of the model are gradually adjusting wages and prices, perfect foresight on current inflation rates and an adaptive revision of the inflationary climate in which the economy is operating. We compare this approach with the New Keynesian approach with staggered price and wage setting and find that whilst both approaches have common components, they have radically different dynamic implications due to the treatment of the forward-looking part of our wage-price spiral. We show that an estimated version of our model implies local asymptotic stability, due to stable interaction of goods market dynamics with the interest rate policy rule of the central bank, and due to a normal working of a real-wage feedback chain. These results are however endangered when there is a global floor to money wage inflation rates, leading in fact to economic breakdown. In this latter case, the return of some money wage flexibility in deep depressions is of help in restoring the viability of the model, thereby avoiding explosive dynamics and the collapse of the economy.

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Article provided by Charles University Prague, Faculty of Social Sciences, Institute of Economic Studies in its journal AUCO Czech Economic Review.

Volume (Year): 4 (2010)
Issue (Month): 3 (November)
Pages: 236-262

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Handle: RePEc:fau:aucocz:au2010_236
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  1. Mankiw, N Gregory, 2001. "The Inexorable and Mysterious Tradeoff between Inflation and Unemployment," Economic Journal, Royal Economic Society, vol. 111(471), pages C45-61, May.
  2. repec:cup:cbooks:9780521850254 is not listed on IDEAS
  3. Chiarella, Carl & Flaschel, Peter, 1996. "Real and monetary cycles in models of Keynes-Wicksell type," Journal of Economic Behavior & Organization, Elsevier, vol. 30(3), pages 327-351, September.
  4. Pu Chen & Carl Chiarella & Peter Flaschel & Willi Semmler, 2006. "Keynesian Macrodynamics and the Phillips Curve. An Estimated Baseline Macromodel for the U.S. Economy," Working Paper Series 147, Finance Discipline Group, UTS Business School, University of Technology, Sydney.
  5. J. Barkley Rosser, 1999. "On the Complexities of Complex Economic Dynamics," Journal of Economic Perspectives, American Economic Association, vol. 13(4), pages 169-192, Fall.
  6. Pu Chen & Peter Flaschel, 2005. "Keynesian Dynamics and the Wage–Price Spiral: Identifying Downward Rigidities," Computational Economics, Society for Computational Economics, vol. 25(1), pages 115-142, February.
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