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An agent-based "proof of principle" for Walrasian macroeconomic theory

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  • Edoardo Gaffeo

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  • Mauro Gallegati
  • Umberto Gostoli

Abstract

Macroeconomic models are typically solved through the imposition of a top-down general equilibrium solution constraining agents' rational be- havior. This is customarily obtained by recurring, explicitly or not, to the Walrasian auctioneer (WA) artifice. In this paper we aim at contributing to the small but burgeoning literature that deals with the consequences of removing it from the start by means of agent-based techniques. We let the textbook full-employment neoclassical macroeconomic model be populated by a large number of bounded-rational, autonomous agents, who are repeatedly engaged in decentralized transactions in interrelated markets. We set up a computational laboratory to perform several exper- iments, whose designs di�er as regards the way we treat learning on the one side, and the institutional arrangement determining who - between firms and workers - is bound to bear the risk associated to incomplete markets on the other one. We show that our fully decentralized multi- market system admits the possibility to attain the WA full-employment solution, but also that serious coordination failures emerge endogenously as learning mechanisms and institutional settings are varied.

Suggested Citation

  • Edoardo Gaffeo & Mauro Gallegati & Umberto Gostoli, 2012. "An agent-based "proof of principle" for Walrasian macroeconomic theory," CEEL Working Papers 1202, Cognitive and Experimental Economics Laboratory, Department of Economics, University of Trento, Italia.
  • Handle: RePEc:trn:utwpce:1202
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    File URL: http://www-ceel.economia.unitn.it/papers/papero12_02.pdf
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    Cited by:

    1. Mellár, Tamás & Hau, Orsolya & Sebestyén, Tamás, 2013. "Láthatóvá tehető-e a láthatatlan kéz? Egy ágensalapú piaci modell tapasztalatai
      [Can the invisible hand be rendered visible? Experiences of an agent-based market model]
      ," Közgazdasági Szemle (Economic Review - monthly of the Hungarian Academy of Sciences), Közgazdasági Szemle Alapítvány (Economic Review Foundation), vol. 0(9), pages 992-1024.
    2. Gerard Ballot & Antoine Mandel & Annick Vignes, 2015. "Agent-based modeling and economic theory: where do we stand?," Journal of Economic Interaction and Coordination, Springer;Society for Economic Science with Heterogeneous Interacting Agents, vol. 10(2), pages 199-220, October.
    3. Váry, Miklós, 2015. "Piaci alkalmazkodás ragadós árak mellett - Calvo-típusú ármerevség egy ágensalapú modellben
      [Market adjustment under sticky prices: the price rigidity of a Calvo type in an agent-based model]
      ," Közgazdasági Szemle (Economic Review - monthly of the Hungarian Academy of Sciences), Közgazdasági Szemle Alapítvány (Economic Review Foundation), vol. 0(1), pages 48-77.

    More about this item

    Keywords

    Agent-based computational economics; Decentralized exchange process; Microfoundations of macroeconomics;

    JEL classification:

    • B40 - Schools of Economic Thought and Methodology - - Economic Methodology - - - General
    • D51 - Microeconomics - - General Equilibrium and Disequilibrium - - - Exchange and Production Economies
    • E17 - Macroeconomics and Monetary Economics - - General Aggregative Models - - - Forecasting and Simulation: Models and Applications

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