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Journal of Economic Perspectives: Vol. 6 No. 2 (Spring 1992)

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Whom or What Does the Representative Individual Represent?

Article Citation

Kirman, Alan P. 1992. "Whom or What Does the Representative Individual Represent?" Journal of Economic Perspectives, 6(2): 117-136.

DOI: 10.1257/jep.6.2.117

Abstract

Macroeconomic models often assume that the choices of all the diverse agents in one sector—consumers for example—can be considered as the choices of one "representative" standard utility maximizing individual whose choices coincide with the aggregate choices of the heterogeneous individuals. My basic point is that the reduction of the behavior of a group of heterogeneous agents even if they are all themselves utility maximizers, is not simply an analytical convenience as often explained, but is both unjustified and leads to conclusions which are usually misleading and often wrong. First, such models are particularly ill-suited to studying macroeconomic problems like unemployment, which should be viewed as coordination failures. Furthermore these models, instead of being a hive of activity and exchange, are frequently, ones in which no trade at all takes place. And this is just the beginning of a list of problems with this approach. Finally I will consider more positive alternatives to the representative individual approach—approaches that focus on heterogeneity of agents may and interaction between individuals. It is clear that the "representative" agent deserves a decent burial, as an approach to economic analysis that is not only primitive, but fundamentally erroneous.

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Authors

Kirman, Alan P. (European U Institute, Florence)

JEL Classifications

E10: General Aggregative Models: General

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