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Worms: Education and health externalities in kenya

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  • Michael Kremer
  • Edward Miguel

Abstract

Intestinal helminths - including hookworm, roundworm, schistosomiasis, and whipworm - infect more than one-quarter of the world's population. A randomized evaluation of a project in Kenya suggests that school-based mass treatment with deworming drugs reduced school absenteeism in treatment schools by one quarter; gains are especially large among the youngest children. Deworming is found to be cheaper than alternative ways of boosting school participation. By reducing disease transmission, deworming creates substantial externality health and school participation benefits among untreated children in the treatment schools and among children in neighboring schools. These externalities are large enough to justify fully subsidizing treatment. We do not find evidence that deworming improves academic test scores. Existing experimental studies, in which treatment is randomized among individuals in the same school, find small and insignificant deworming treatment effects on education; however, these studies underestimate true treatment effects if deworming creates positive externalities for the control group and reduces treatment group attrition.

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  • Michael Kremer & Edward Miguel, 2004. "Worms: Education and health externalities in kenya," Natural Field Experiments 00288, The Field Experiments Website.
    • Handle: RePEc:feb:natura:00288
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    Cited by:

    1. Wechtler, Annika & Michaelowa, Katharina & Fehrler, Sebastian, 2007. "The cost-effectiveness of inputs in primary education: Insights from recent student surveys for sub-Saharan Africa," Proceedings of the German Development Economics Conference, Göttingen 2007 5, Verein für Socialpolitik, Research Committee Development Economics.
    2. Esther Duflo & Emmanuel Saez, 2003. "The Role of Information and Social Interactions in Retirement Plan Decisions: Evidence from a Randomized Experiment," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 118(3), pages 815-842.
    3. Bloom, David E. & Canning, David & Sevilla, Jaypee, 2004. "The Effect of Health on Economic Growth: A Production Function Approach," World Development, Elsevier, vol. 32(1), pages 1-13, January.
    4. Burgess, Robin & Venables, Anthony J., 2004. "Toward a microeconomics of growth," Policy Research Working Paper Series 3257, The World Bank.
    5. Masayuki Kudamatsu, 2012. "Has Democratization Reduced Infant Mortality In Sub-Saharan Africa? Evidence From Micro Data," Journal of the European Economic Association, European Economic Association, vol. 10(6), pages 1294-1317, December.
    6. Stéphane J. Baele, 2013. "The ethics of New Development Economics: is the Experimental Approach to Development Economics morally wrong?," The Journal of Philosophical Economics, Bucharest Academy of Economic Studies, The Journal of Philosophical Economics, vol. 7(1), November.
    7. Politi, Dimitra, 2010. "The Impact of Iodine Deficiency Eradication on Schooling: Evidence from the Introduction of Iodized Salt in Switzerland," SIRE Discussion Papers 2010-02, Scottish Institute for Research in Economics (SIRE).
    8. José García-Montalvo & Marta Reynal-Querol, 2002. "Fighting Against Malaria: Prevent Wars While Waiting For The "Miraculous" Vaccine," Working Papers. Serie EC 2002-31, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
    9. Clemens, Michael A. & Kenny, Charles J. & Moss, Todd J., 2007. "The Trouble with the MDGs: Confronting Expectations of Aid and Development Success," World Development, Elsevier, vol. 35(5), pages 735-751, May.
    10. Chishio Furukawa, 2014. "Do Solar Lamps Help Children Study? Contrary Evidence from a Pilot Study in Uganda," Journal of Development Studies, Taylor & Francis Journals, vol. 50(2), pages 319-341, February.
    11. Vermeersch, Christel & Kremer, Michael, 2005. "Schools meals, educational achievement and school competition: evidence from a randomized evaluation," Policy Research Working Paper Series 3523, The World Bank.
    12. Omar Azfar & Clifford Zinnes, 2006. "Which incentives work? An experimental analysis of incentives for trainers," Natural Field Experiments 00209, The Field Experiments Website.
    13. Ranis, Gustav, 2004. "The Evolution of Development Thinking: Theory and Policy," Center Discussion Papers 28528, Yale University, Economic Growth Center.
    14. Anoshua Chaudhuri, 2005. "Direct and Indirect Effects of a Maternal and Child Health Program in Rural Bangladesh," Journal of Developing Societies, , vol. 21(1-2), pages 143-173, June.
    15. Timothy Besley & Robin Burgess, 2003. "Halving Global Poverty," Journal of Economic Perspectives, American Economic Association, vol. 17(3), pages 3-22, Summer.
    16. Michael Kremer & Sylvie Moulin & Robert Namunyu, 2003. "Decentralization: A cautionary tale," Natural Field Experiments 00290, The Field Experiments Website.
    17. Paul Glewwe, 2002. "Schools and Skills in Developing Countries: Education Policies and Socioeconomic Outcomes," Journal of Economic Literature, American Economic Association, vol. 40(2), pages 436-482, June.
    18. World Bank, 2009. "Kenya - Poverty and Inequality Assessment : Executive Summary and Synthesis Report," World Bank Publications - Reports 3081, The World Bank Group.

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    More about this item

    JEL classification:

    • I00 - Health, Education, and Welfare - - General - - - General
    • I10 - Health, Education, and Welfare - - Health - - - General

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