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Is Consanguinity an Impediment to Child Development Outcomes?


  • Mete, Cem

    (World Bank)

  • Bossavie, Laurent

    () (World Bank)

  • Giles, John T.

    () (World Bank)

  • Alderman, Harold

    () (World Bank)


Marriages between blood relatives – also known as consanguineous unions – are widespread in North Africa, Central and West Asia and most parts of South Asia. Researchers have suggested that consanguinity has adverse effects on child development, but assessing its impact is not straightforward as the decision to marry a relative might be endogenous to other socio-economic factors. Using a unique dataset collected in rural Pakistan, this paper assesses the extent to which consanguinity is linked to child cognitive ability and nutritional status. As economic benefits of marrying cousins may lead to upward bias to estimates of the effects of consanguinity on child outcomes, prior work likely underestimates the negative impacts of consanguinity on child outcomes. After controlling for current household wealth and parent education, this paper exploits (current and past) grandfather land ownership and maternal grandparent mortality to identify the effect of endogenous consanguinity on child cognitive ability and height-for-age. Children born into consanguineous unions have lower cognitive scores, lower height-for-age, and a higher likelihood of being severely stunted. More importantly, adverse effects are significantly larger after accounting for the endogeneity of consanguineous unions, suggesting that negative impacts on child development are substantial, and likely to be larger than suggested in previous studies. Reducing incentives for consanguineous unions should therefore be of concern among policy makers aiming at improving child development outcomes where marrying cousins is common.

Suggested Citation

  • Mete, Cem & Bossavie, Laurent & Giles, John T. & Alderman, Harold, 2019. "Is Consanguinity an Impediment to Child Development Outcomes?," IZA Discussion Papers 12665, Institute of Labor Economics (IZA).
  • Handle: RePEc:iza:izadps:dp12665

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    References listed on IDEAS

    1. Becker, Gary S & Tomes, Nigel, 1976. "Child Endowments and the Quantity and Quality of Children," Journal of Political Economy, University of Chicago Press, vol. 84(4), pages 143-162, August.
    2. Keith Finlay & Leandro M. Magnusson, 2009. "Implementing weak-instrument robust tests for a general class of instrumental-variables models," Stata Journal, StataCorp LP, vol. 9(3), pages 398-421, September.
    3. Marcelo J. Moreira, 2003. "A Conditional Likelihood Ratio Test for Structural Models," Econometrica, Econometric Society, vol. 71(4), pages 1027-1048, July.
    4. Quy-Toan Do & Sriya Iyer & Shareen Joshi, 2013. "The Economics of Consanguineous Marriages," The Review of Economics and Statistics, MIT Press, vol. 95(3), pages 904-918, July.
    5. Deon Filmer & Lant Pritchett, 2001. "Estimating Wealth Effects Without Expenditure Data—Or Tears: An Application To Educational Enrollments In States Of India," Demography, Springer;Population Association of America (PAA), vol. 38(1), pages 115-132, February.
    6. A. Colin Cameron & Douglas L. Miller, 2015. "A Practitioner’s Guide to Cluster-Robust Inference," Journal of Human Resources, University of Wisconsin Press, vol. 50(2), pages 317-372.
    7. Ahmed Mobarak & Randall Kuhn & Christina Peters, 2013. "Consanguinity and Other Marriage Market Effects of a Wealth Shock in Bangladesh," Demography, Springer;Population Association of America (PAA), vol. 50(5), pages 1845-1871, October.
    8. Anderson, Michael L., 2008. "Multiple Inference and Gender Differences in the Effects of Early Intervention: A Reevaluation of the Abecedarian, Perry Preschool, and Early Training Projects," Journal of the American Statistical Association, American Statistical Association, vol. 103(484), pages 1481-1495.
    9. Linda Dorsten & Lawrence Hotchkiss & Terri King, 1999. "The effect of inbreeding on early childhood mortality: Twelve generations of an amish settlement," Demography, Springer;Population Association of America (PAA), vol. 36(2), pages 263-271, May.
    10. Das, Jishnu & Hammer, Jeffrey, 2005. "Which doctor? Combining vignettes and item response to measure clinical competence," Journal of Development Economics, Elsevier, vol. 78(2), pages 348-383, December.
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    More about this item


    consanguineous marriages; cognitive tests; malnutrition; household decision making; child development;

    JEL classification:

    • I15 - Health, Education, and Welfare - - Health - - - Health and Economic Development
    • J12 - Labor and Demographic Economics - - Demographic Economics - - - Marriage; Marital Dissolution; Family Structure


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