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Portfolio choice when relative income matters

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  • Park, Sangkyun

Abstract

This paper derives conditions under which concerns about relative income produce rational herding--the shift of individuals' portfolios into the same direction as others'. To endure the generality of results, the model makes parsimonious behavioral assumptions and no assumption about the functional form of utility. The two most critical conditions are substitutability between one's own income and relative income and diminishing marginal utility of relative income. The keeping-up-with-the-Joneses (KUJ) motive unambiguously contributes to rational herding. When relative income is viewed as a measure of status, however, the KUJ motive is neither a necessary nor a sufficient condition.

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  • Park, Sangkyun, 2009. "Portfolio choice when relative income matters," Journal of Behavioral and Experimental Economics (formerly The Journal of Socio-Economics), Elsevier, vol. 38(3), pages 530-533, June.
  • Handle: RePEc:eee:soceco:v:38:y:2009:i:3:p:530-533
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    1. H. Allen Orr, 2018. "Evolution, finance, and the population genetics of relative wealth," Journal of Bioeconomics, Springer, vol. 20(1), pages 29-48, April.

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