We use cookies to distinguish you from other users and to provide you with a better experience on our websites.Close this message to accept cookies or find out how to manage your cookie settings.
Learn more about our Privacy Notice...
[opens in a new tab]
This content is a preprint and has not undergone peer review at the time of posting.
Abstract
All data used are publicly available. Demographic data are available via IPUMS National Historic Geographic Information Systems [www.nhgis.org]; air pollution estimates are available via the EPA CACES project [www.caces.us]).