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Life-cycle portfolio choice: The role of heterogeneous under-diversification

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  • Campanale, Claudio

Abstract

In life-cycle portfolio choice models it is standard to assume that all agents invest in a diversified stock market index. In contrast recent empirical evidence, summarized in Campbell [2006. Household finance. Journal of Finance 61, 1553-1604] suggests that households' financial portfolios are under-diversified and that there is substantial heterogeneity in diversification. In the present paper I examine the effects of heterogeneous under-diversification in a life-cycle portfolio choice model with uninsurable uncertain earnings and fixed per-period participation costs. The analysis of the model shows that realistically calibrated under-diversification gives an important contribution to the explanation of two key facts of households' portfolio allocation: the moderate stock market participation rate and the moderate stock share for participants.

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  • Campanale, Claudio, 2009. "Life-cycle portfolio choice: The role of heterogeneous under-diversification," Journal of Economic Dynamics and Control, Elsevier, vol. 33(9), pages 1682-1698, September.
  • Handle: RePEc:eee:dyncon:v:33:y:2009:i:9:p:1682-1698
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    Cited by:

    1. Astrup Jensen, Bjarne & Marekwica, Marcel, 2011. "Optimal portfolio choice with wash sale constraints," Journal of Economic Dynamics and Control, Elsevier, vol. 35(11), pages 1916-1937.
    2. Thomas Post & Helmut Gründl & Joan T. Schmit & Anja Zimmer, 2014. "The Impact of Investment Behaviour for Individual Welfare," Economica, London School of Economics and Political Science, vol. 81(321), pages 15-47, January.
    3. Zhou, Jie, 2012. "Life-cycle stock market participation in taxable and tax-deferred accounts," Journal of Economic Dynamics and Control, Elsevier, vol. 36(11), pages 1814-1829.

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