An agent-based “proof of principle” for Walrasian macroeconomic theory

Edoardo Gaffeo, Mauro Gallegati and Umberto Gostoli
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Umberto Gostoli: University of Waterloo

Computational and Mathematical Organization Theory, 2015, vol. 21, issue 2, No 2, 150-183

Abstract: Abstract Macroeconomic models are typically solved through the imposition of a top-down general equilibrium solution constraining agents’ rational behavior. This is customarily obtained by recurring, explicitly or not, to the Walrasian auctioneer 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 experiments, whose designs differ 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 Walrasian full-employment solution, but also that serious coordination failures emerge endogenously as learning mechanisms and institutional settings are varied.

Keywords: Agent-based computational economics; Decentralized exchange processes; Learning; Microfoundations of macroeconomics (search for similar items in EconPapers)
Date: 2015
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DOI: 10.1007/s10588-014-9180-7

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