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A Technical Definition of Uncertainty and the Long-run Non-neutrality of Money

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  • Davidson, Paul

Abstract

A technical definition of uncertainty can be developed if economic observations can be generated by stochastic processes. Uncertainty about the future is then defined in terms of the existence of a nonergodic economic environment. In such an environment, statistics based on either cross-sectional data or on past time-series data do not provide good forecasts of future outcomes, i.e., past evidence does not provide reliable estimates of future results. The problem facing every decisionmaker is to determine whether the phenomena is sufficiently time invariant as to be presumed ergodic or whether nonergodic circumstances are involved. Keynes's use of uncertainty in the discussion of liquidity is compatible with a nonergodic environment. Only in a nonergodic environment do the concepts of money, fixed contracts, and liquidity make sense, and then all existence theorems for general equilibrium are jeopardized. Copyright 1988 by Oxford University Press.

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  • Davidson, Paul, 1988. "A Technical Definition of Uncertainty and the Long-run Non-neutrality of Money," Cambridge Journal of Economics, Cambridge Political Economy Society, vol. 12(3), pages 329-337, September.
    • Handle: RePEc:oup:cambje:v:12:y:1988:i:3:p:329-37
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    Cited by:

    1. Eckhard Hein, 2005. "Finanzstruktur und Wirtschaftswachstum - theoretische und empirische Aspekte," IMK Studies 01-2005, IMK at the Hans Boeckler Foundation, Macroeconomic Policy Institute.
    2. Fusari, Angelo, 2013. "Radical Uncertainty, Dynamic Competition and a Model of the Business Cycle," MPRA Paper 74015, University Library of Munich, Germany, revised Mar 2013.
    3. Milan Sojka, 2009. "Stane se institucionální ekonomie paradigmatem 21. stoletÍ? [Will the institutional economy become the 21st century paradigm?]," Politická ekonomie, Prague University of Economics and Business, vol. 2009(3), pages 297-304.
    4. Hein, Eckhard & Dodig, Nina & Budyldina, Natalia, 2014. "Financial, economic and social systems: French Regulation School, Social Structures of Accumulation and Post-Keynesian approaches compared," IPE Working Papers 34/2014, Berlin School of Economics and Law, Institute for International Political Economy (IPE).
    5. Hein, Eckhard, 2004. "Money, credit and the interest rate in Marx's economic. On the similarities of Marx's monetary analysis to Post-Keynesian economics," MPRA Paper 18608, University Library of Munich, Germany.
    6. Piero Ferri & Anna Maria Variato, 2007. "Macro Dynamics in a Model with Uncertainty," Working Papers (-2012) 0704, University of Bergamo, Department of Economics.
    7. Chenet, Hugues & Ryan-Collins, Josh & van Lerven, Frank, 2021. "Finance, climate-change and radical uncertainty: Towards a precautionary approach to financial policy," Ecological Economics, Elsevier, vol. 183(C).
    8. Agnieszka Barczak & Izabela Dembinska & Lukasz Marzantowicz & Katarzyna Nowicka & Katarzyna Szopik-Depczynska & Tomasz Rostkowski, 2020. "The Impact of Unpredictable Factors on the Uncertainty’s Structure in the Management of Logistics Processes," European Research Studies Journal, European Research Studies Journal, vol. 0(Special 1), pages 186-200.
    9. Shyam Gouri Suresh & Mark Setterfield, "undated". "Firm performance, macroeconomic conditions, and “animal spirits” in a Post Keynesian model of aggregate fluctuations," Working Papers 14-09, Davidson College, Department of Economics.
    10. Eckhard Hein, 2017. "Post-Keynesian macroeconomics since the mid 1990s: main developments," European Journal of Economics and Economic Policies: Intervention, Edward Elgar Publishing, vol. 14(2), pages 131-172, September.
    11. Fontana, Giuseppe & Gerrard, Bill, 2004. "A Post Keynesian theory of decision making under uncertainty," Journal of Economic Psychology, Elsevier, vol. 25(5), pages 619-637, October.
    12. Pope, Robin & Selten, Reinhard & Kube, Sebastian, 2009. "Nominalist Heuristics and Economic Theory," Bonn Econ Discussion Papers 17/2009, University of Bonn, Bonn Graduate School of Economics (BGSE).
    13. von Hagen, Jürgen & Kube, Sebastian & Kaiser, Johannes & Selten, Reinhard & Pope, Robin, 2006. "Prominent Numbers and Ratios in Exchange Rate Determination: Field and Laboratory Evidence," Bonn Econ Discussion Papers 29/2006, University of Bonn, Bonn Graduate School of Economics (BGSE).
    14. Jan Zápal, 2005. "Evropská měnová unie z post-keynesovské perspektivy [European monetary union from post keynesian perspective]," Politická ekonomie, Prague University of Economics and Business, vol. 2005(5), pages 687-701.
    15. Stephen Dunn, 2000. "Fundamental Uncertainty and the Firm in the Long Run," Review of Political Economy, Taylor & Francis Journals, vol. 12(4), pages 419-433.
    16. Milan Sojka, 2010. "Monetární politika evropské centrální banky a její teoretická východiska pohledem postkeynesovské ekonomie [Monetary Policy of the European Central Bank and Its Theoretical Resources in the View of," Politická ekonomie, Prague University of Economics and Business, vol. 2010(1), pages 3-19.
    17. Pope, Robin & Selten, Reinhard & Kube, Sebastian & von Hagen, Jürgen, 2009. "Prominent Numbers, Indices and Ratios in Exchange Rate Determination and Financial Crashes: in Economists’ Models, in the Field and in the Laboratory," Bonn Econ Discussion Papers 18/2009, University of Bonn, Bonn Graduate School of Economics (BGSE).
    18. Bernard Shull, 1993. "The Limits of Prudential Supervision: Economic Problems, Institutional Failure and Competence," Economics Working Paper Archive wp_88, Levy Economics Institute.
    19. José Eduardo Gómez & Nidia Ruth Reyes, 2002. "El racionamiento del crédito y las crisis financieras," Revista de Economía Institucional, Universidad Externado de Colombia - Facultad de Economía, vol. 4(7), pages 62-75, July-Dece.
    20. Ivan V. Rozmainsky, 2015. "Investor myopia and persistence of the global crisis- a post Keynesian view," Montenegrin Journal of Economics, Economic Laboratory for Transition Research (ELIT), vol. 11(1), pages 107-116.
    21. Lavoie, Marc, 1992. "Éléments d’analyse d’une synthèse post-classique," L'Actualité Economique, Société Canadienne de Science Economique, vol. 68(4), pages 607-631, décembre.
    22. Váry, Miklós, 2021. "The long-run real effects of monetary shocks: Lessons from a hybrid post-Keynesian-DSGE-agent-based menu cost model," Economic Modelling, Elsevier, vol. 105(C).

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