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Diversification in Children


  • Jinyoung Kim

    () (Korea University)


This paper develops a dynamic model of the decisions regarding the quantity and quality of children, predicated on two premises: (1) the quality of children is uncertain when parents make a human capital investment decision, and (2) the quality distributions of two children of a woman are less correlated if they are farthered by different men than by the same man, as the result of either (or both) genetic inheritance or father-specific training. It follows logically that a parent seeks to hedge the risk of children quality by having childrent fathered by different men, or by diversifying their portfolio of children. We derive and test discriminating propositions concerning chlid diversification and human capital investment in children. Consistent with these propositions, our empirical results show that women with less education, more income, and higher degrees of income uncertainty are more likely to diversify. We also demonstrate that human capital investment in a child fathered by a new mate is lower, and that higher degrees of income uncertainty increase investment.

Suggested Citation

  • Jinyoung Kim, 2010. "Diversification in Children," Discussion Paper Series 1002, Institute of Economic Research, Korea University.
  • Handle: RePEc:iek:wpaper:1002

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    References listed on IDEAS

    1. Derek Neal, 2004. "The Relationship Between Marriage Market Prospects and Never-Married Motherhood," Journal of Human Resources, University of Wisconsin Press, vol. 39(4).
    2. Robert J. Willis, 1999. "A Theory of Out-of-Wedlock Childbearing," Journal of Political Economy, University of Chicago Press, vol. 107(S6), pages 33-64, December.
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    Blog mentions

    As found by, the blog aggregator for Economics research:
    1. Why less educated mothers have children from different fathers
      by Economic Logician in Economic Logic on 2010-04-20 19:06:00

    More about this item


    Fertility; Quality of Children; Human capital; Diversification;

    JEL classification:

    • J13 - Labor and Demographic Economics - - Demographic Economics - - - Fertility; Family Planning; Child Care; Children; Youth
    • J12 - Labor and Demographic Economics - - Demographic Economics - - - Marriage; Marital Dissolution; Family Structure

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