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INTRODUCTION

Published online by Cambridge University Press:  01 October 2007

ALAN KIRMAN
ALAN KIRMAN
Affiliation:
GREQAM, Université d'Aix-Marseille III École des Hautes Études en Sciences Sociales
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Abstract

This issue contributes to the discussion of the relation between individual and aggregate behavior. The basic feature of all the models presented is that they allow for direct interaction between the individuals. This, it is shown, leads to a number of interesting phenomena that are difficult to account for in standard models. The basic message is that the inclusion of heterogeneous interacting agents allows us to escape from the pitfalls associated with the reduction to a representative individual and furthermore to show that aggregates will, in general, have behavior that is different from that of the component individuals. Lastly, complex aggregate behavior is not necessarily the result of complicated individual reasoning, it can emerge from very simple rule following by individuals.

Keywords

Aggregate and Individual BehaviorInteractionHeterogeneityMarketsHerdingBehavioral RulesDynamicsLearning
Type
INTRODUCTION
Information
Macroeconomic Dynamics , Volume 11 , Supplement S1: Interacting Agents and Market Behavior , November 2007 , pp. 1 - 7
Copyright
© 2007 Cambridge University Press

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References

Chamley C. 2004 Rational herds: Economic models of social learning. Cambridge: Cambridge University Press.
Evans G.W. and Honkapohja S. 2001 Learning and expectations in macroeconomics. Princeton, NJ: Princeton University Press.
Foellmer H., U. Horst and A. Kirman 2005 Equilibria in financial markets with heterogeneous agents: A probabilistic perspective. Journal of Mathematical Economics 41 (1–2), 123– 155.Google Scholar
Frankel J.A. and K.A. Froot 1988 Chartists, fundamentalists and the demand for dollars. Greek Economic Review 10, 49– 102.Google Scholar
Greenwald B. and J. Stiglitz 1993 Financial market imperfections and business cycles. Quarterly Journal of Economics 108, 77.Google Scholar
Kirman A. 1992 Whom or what does the representative individual represent? Journal of Economic Perspectives 6 (2), 117– 136.Google Scholar
Kirman A. 1993 Ants, rationality, and recruitment. Quarterly Journal of Economics 108, 138– 155.Google Scholar
LeBaron B. 2001 Stochastic volatility as a simple generator of apparent financial power laws and long memory. Quantitative Finance 1, 621– 631.Google Scholar
Scheinkman J.A. and W. Xiong 2003 Overconfidence and speculative bubbles. Journal of Political Economy 111, 1183– 1219.Google Scholar
Stoker Thomas M. 1993 Empirical approaches to the problem of aggregation over individuals. Journal of Economic Literature 31 (4), 1827– 1874.Google Scholar