Titelaufnahme

Titel
The legacy lead deposition in soils and its impact on cognitive function in preschool-aged children in the United States / Karen Clay (Carnegie Mellon University and NBER), Margarita Portnykh (Carnegie Mellon University), Edson Severnini (Carnegie Mellon University and IZA) ; IZA Institute of Labor Economics
VerfasserClay, Karen ; Portnykh, Margarita ; Severnini, Edson R.
KörperschaftForschungsinstitut zur Zukunft der Arbeit
ErschienenBonn, Germany : IZA Institute of Labor Economics, February 2019
Ausgabe
Elektronische Ressource
Umfang1 Online-Ressource (50 Seiten) : Diagramme, Karten
SerieDiscussion paper ; no. 12178
URLVolltext
URNurn:nbn:de:hbz:5:2-183161 
Zugänglichkeit
 Das Dokument ist öffentlich zugänglich im Rahmen des deutschen Urheberrechts.
Volltexte
The legacy lead deposition in soils and its impact on cognitive function in preschool-aged children in the United States [2.42 mb]
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Nachweis
Verfügbarkeit In meiner Bibliothek
Zusammenfassung (Englisch)

Surface soil contamination has been long recognized as an important pathway of human lead exposure, and is now a worldwide health concern. This study estimates the causal effects of exposure to lead in topsoil on cognitive ability among 5-year-old children. We draw on individual level data from the 2000 U.S. Census, and USGS data on lead in topsoil covering a broad set of counties across the United States. Using an instrumental variable approach relying on the 1944 Interstate Highway System Plan, we find that higher lead in topsoil increases considerably the probability of 5-year-old boys experiencing cognitive difficulties such as learning, remembering, concentrating, or making decisions. Living in counties with topsoil lead concentration above the national median roughly doubles the probability of 5-year-old boys having cognitive difficulties. Nevertheless, it does not seem to affect 5-year-old girls, consistent with previous studies. Importantly, the adverse effects of lead exposure on boys are found even in counties with levels of topsoil lead concentration considered low by the guidelines from the U.S. EPA and state agencies. These findings are concerning because they suggest that legacy lead may continue to impair cognition today, both in the United States and in other countries that have considerable lead deposition in topsoil.

Nutzungshinweis
 Das Medienwerk ist im Rahmen des deutschen Urheberrechts nutzbar.