There's new research out today that shows the life expectancy gap between the rich and the poor in America is wide and growing — but not necessarily inevitable.
For the study, published today in JAMA, a group of researchers led by Stanford University economist Raj Chetty analyzed income data for the US population from 1.4 billion tax records between 1999 and 2014. They then compared it with mortality data from Social Security Administration death records.
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