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The nature of equilibrium in macroeconomics: a critique of equilibrium search theory

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  • Aoki, Masanao
  • Yoshikawa, Hiroshi

Abstract

The standard Walrasian equilibrium theory requires that the marginal value product of production factor such as labor is equal across firms and industries. However, productivity dispersion is widely observed in the real economy. Search theory allegedly fills this gap by encompassing apparent disequilibrium phenomena in the neoclassical equilibrium framework. Taking up Lucas and Prescott (1974) as a primary example, we show that the neoclassical search theory cannot explain the observed pattern of productivity dispersion. Non-self-averaging, a concept little known to economists, plays the major role. Empirical observation suggests strongly the presence of disturbing forces which dominate equilibrating forces due to optimizing behavior of economic agents. We must seek a new concept of equilibrium different from the standard Walrasian equilibrium in macroeconomics. --

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Bibliographic Info

Article provided by Kiel Institute for the World Economy in its journal Economics: The Open-Access, Open-Assessment E-Journal.

Volume (Year): 3 (2009)
Issue (Month): 37 ()
Pages: 1-9

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Handle: RePEc:zbw:ifweej:200937

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Keywords: Equilibrium; search theory; productivity dispersion; power-law; non-self-averaging;

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  1. Masanao Aoki, 2002. "Open Models of Share Markets with Two Dominant Types of Participants," UCLA Economics Online Papers 107, UCLA Department of Economics.
  2. Lucas, Robert Jr. & Prescott, Edward C., 1974. "Equilibrium search and unemployment," Journal of Economic Theory, Elsevier, vol. 7(2), pages 188-209, February.
  3. Arthur M. Okun, 1973. "Upward Mobility in a High-Pressure Economy," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 4(1), pages 207-262.
  4. Masanao Aoki, 2006. "Thermodynamic Limits of Macroeconomic or Financial Models: One-and Two-Parameter Poisson-Dirichlet Models," CIRJE F-Series CIRJE-F-445, CIRJE, Faculty of Economics, University of Tokyo.
  5. Tobin, James, 1972. "Inflation and Unemployment," American Economic Review, American Economic Association, vol. 62(1), pages 1-18, March.
  6. AOKI Masanao & YOSHIKAWA Hiroshi, 2007. "Non-Self-Averaging in Macroeconomic Models: A Criticism of Modern Micro-founded Macroeconomics," Discussion papers 07057, Research Institute of Economy, Trade and Industry (RIETI).
  7. Hideaki Aoyama & Hiroshi Yoshikawa & Hiroshi Iyetomi & Yoshi Fujiwara, 2008. "Productivity Dispersion: Facts, Theory, and Implications," Papers 0805.2792, arXiv.org.
  8. Kydland, Finn E & Prescott, Edward C, 1982. "Time to Build and Aggregate Fluctuations," Econometrica, Econometric Society, vol. 50(6), pages 1345-70, November.
  9. Steven J. Davis & John C. Haltiwanger & Scott Schuh, 1998. "Job Creation and Destruction," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262540932, December.
  10. Masanao Aoki, 2000. "Cluster Size Distribution of Economics Agents of Many Types in Market," UCLA Economics Online Papers 102, UCLA Department of Economics.
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