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Twenty-year economic impacts of deworming

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  • Hamory, Joan
  • Miguel, Edward
  • Walker, Michael
  • Kremer, Michael
  • Baird, Sarah

Abstract

Estimating the impact of child health investments on adult living standards entails multiple methodological challenges, including the lack of experimental variation in health status, an inability to track individuals over time, and accurately measuring living standards and productivity in low-income settings. This study exploits a randomized school health intervention that provided deworming treatment to Kenyan children, and uses longitudinal data to estimate impacts on economic outcomes up to 20 y later. The effective respondent tracking rate was 84%. Individuals who received two to three additional years of childhood deworming experienced a 14% gain in consumption expenditures and 13% increase in hourly earnings. There are also shifts in sectors of residence and employment: treatment group individuals are 9% more likely to live in urban areas, and experience a 9% increase in nonagricultural work hours. Most effects are concentrated among males and older individuals. The observed consumption and earnings benefits, together with deworming's low cost when distributed at scale, imply that a conservative estimate of its annualized social internal rate of return is 37%, a high return by any standard.

Suggested Citation

  • Hamory, Joan & Miguel, Edward & Walker, Michael & Kremer, Michael & Baird, Sarah, 2021. "Twenty-year economic impacts of deworming," Department of Economics, Working Paper Series qt1mv5691c, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
  • Handle: RePEc:cdl:econwp:qt1mv5691c
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    References listed on IDEAS

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    1. 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," Department of Agricultural & Resource Economics, UC Berkeley, Working Paper Series qt15n8j26f, Department of Agricultural & Resource Economics, UC Berkeley.
    2. Bouguen, Adrien & Huang, Yue & Kremer, Michael & Miguel, Edward, 2018. "Using Rcts to Estimate Long-Run Impacts in Development Economics," Department of Economics, Working Paper Series qt4sk6c4f7, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
    3. Douglas Almond & Janet Currie & Valentina Duque, 2018. "Childhood Circumstances and Adult Outcomes: Act II," Journal of Economic Literature, American Economic Association, vol. 56(4), pages 1360-1446, December.
    4. Croke,Kevin & Hicks,Joan Hamory & Hsu,Eric & Kremer,Michael Robert & Miguel,Edward A., 2016. "Does mass deworming affect child nutrition ? meta-analysis, cost-effectiveness, and statistical power," Policy Research Working Paper Series 7921, The World Bank.
    5. 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.
    6. Edward Miguel & Michael Kremer, 2004. "Worms: Identifying Impacts on Education and Health in the Presence of Treatment Externalities," Econometrica, Econometric Society, vol. 72(1), pages 159-217, January.
    7. Adrien Bouguen & Yue Huang & Michael Kremer & Edward Miguel, 2019. "Using Randomized Controlled Trials to Estimate Long-Run Impacts in Development Economics," Annual Review of Economics, Annual Reviews, vol. 11(1), pages 523-561, August.
    8. Hoyt Bleakley, 2007. "Disease and Development: Evidence from Hookworm Eradication in the American South," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 122(1), pages 73-117.
    9. Udry, Christopher, 1996. "Gender, Agricultural Production, and the Theory of the Household," Journal of Political Economy, University of Chicago Press, vol. 104(5), pages 1010-1046, October.
    10. Owen Ozier, 2018. "Exploiting Externalities to Estimate the Long-Term Effects of Early Childhood Deworming," American Economic Journal: Applied Economics, American Economic Association, vol. 10(3), pages 235-262, July.
    11. Mark M. Pitt & Mark R. Rosenzweig & Mohammad Nazmul Hassan, 2012. "Human Capital Investment and the Gender Division of Labor in a Brawn-Based Economy," American Economic Review, American Economic Association, vol. 102(7), pages 3531-3560, December.
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    1. Twenty-year economic impacts of deworming.
      by maximorossi in NEP-LTV blog on 2021-05-19 16:29:08

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    2. Anna Josephson, 2021. "Intra-Household Management of Joint Resources: Evidence from Malawi," Papers 2112.12766, arXiv.org, revised Apr 2022.

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    More about this item

    Keywords

    Behavioral and Social Science; Pediatric; Clinical Research; Adolescent; Adult; Anthelmintics; Child; Child Health; Cost of Illness; Drug Utilization; Employment; Helminthiasis; Humans; Income; Kenya; deworming; child health; long-run impacts;
    All these keywords.

    JEL classification:

    • I15 - Health, Education, and Welfare - - Health - - - Health and Economic Development
    • J24 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Human Capital; Skills; Occupational Choice; Labor Productivity
    • O15 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - Economic Development: Human Resources; Human Development; Income Distribution; Migration

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