
A 2007-2011 study by Caitlin Myers and Ezekiel Hooper found iPhone access reduced US birth rates by up to 50% in 15-24 year olds, especially in areas with AT&T network coverage. A separate study by Hernan Moscoso Boedo and Nathan Hudson found teen fertility declined as smartphones became widespread, with faster drops in counties having 4G and broadband.
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New paper on the iPhone and fertility
Summary by ByteBrief