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Hidden hazards and Screening Policy : Predicting Undetected Lead Exposure in Illinois Using Machine Learning

Author

Listed:
  • Abbasi, Ali

    (Department of Surgery, University of California San Francisco)

  • Gazze, Ludovica

    (Department of Economics, University of Warwick)

  • Pals, Bridget

    (School of Law, New York University)

Abstract

Lead exposure remains a significant threat to children’s health despite decades of policies aimed at getting the lead out of homes and neighborhoods. Generally, lead hazards are identified through inspections triggered by high blood lead levels (BLLs) in children. Yet, it is unclear how best to screen children for lead exposure to balance the costs of screening and the potential benefits of early detection, treatment, and lead hazard removal. While some states require universal screening, others employ a targeted approach, but no regime achieves 100% compliance. We estimate the extent and geographic distribution of undetected lead poisoning in Illinois. We then compare the estimated detection rate of a universal screening program to the current targeted screening policy under different compliance levels. To do so, we link 2010-2016 Illinois lead test records to 2010-2014 birth records, demographics, and housing data. We train a random forest classifier that predicts the likelihood a child has a BLL above 5µg/dL. We estimate that 10,613 untested children had a BLL≥5µg/dL in addition to the 18,115 detected cases. Due to the unequal spatial distribution of lead hazards, 60% of these undetected cases should have been screened under the current policy, suggesting limited benefits from universal screening.

Suggested Citation

  • Abbasi, Ali & Gazze, Ludovica & Pals, Bridget, 2022. "Hidden hazards and Screening Policy : Predicting Undetected Lead Exposure in Illinois Using Machine Learning," The Warwick Economics Research Paper Series (TWERPS) 1398, University of Warwick, Department of Economics.
    • Handle: RePEc:wrk:warwec:1398
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    File URL: https://warwick.ac.uk/fac/soc/economics/research/workingpapers/2022/twerp_1398_-_gazze.pdf
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    References listed on IDEAS

    as
    1. Liran Einav & Amy Finkelstein & Tamar Oostrom & Abigail Ostriker & Heidi Williams, 2020. "Screening and Selection: The Case of Mammograms," American Economic Review, American Economic Association, vol. 110(12), pages 3836-3870, December.
    2. Jessica Wolpaw Reyes, 2015. "Lead Exposure And Behavior: Effects On Antisocial And Risky Behavior Among Children And Adolescents," Economic Inquiry, Western Economic Association International, vol. 53(3), pages 1580-1605, July.
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    Keywords

    Lead Poisoning ; Environmental Health ; Screening;
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