Journal of Evolutionary Economics

, Volume 23, Issue 3, pp 641–661 | Cite as

Selection in asset markets: the good, the bad, and the unknown

Regular Article

Abstract

In this paper, we use a series of simple examples to illustrate how wealth-driven selection works in a market for Arrow securities. Our analysis delivers both a good and a bad message. The good message is that, when traders invest constant fractions of their wealth in each asset and have equal consumption rates, markets are informationally efficient: the best informed agent is rewarded and asset prices eventually reflect this information. However, and this is the bad message, when asset demands are not constant fractions of wealth but dependent upon prices, markets might behave sub-optimally. In this case, asymptotic prices depend on preferences and beliefs of the whole ecology of traders and do not, in general, reflect the best available information. We show that the key difference between the two cases lies in the local, i.e. price dependent, versus global nature of wealth-driven selection.

Keywords

Market selection Evolutionary Finance Informational efficiency Asset pricing CRRA preferences 

JEL Classifications

D50 D80 G11 G12 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Istituto di EconomiaScuola Superiore Sant’Anna, Piazza Martiri della Libertà 33PisaItaly
  2. 2.Dipartimento di Economia e ManagementUniversità di Pisa, Via C.Ridolfi 10PisaItaly

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