Previous research found that in 2007, the Walton family had as much wealth as the bottom 30 percent of American families, according to an analysis by labor economist Sylvia Allegretto.
But between 2007 and 2010, that figure changed. The average American family fortune declined during that time period from $126,000 to $77,000, Mother Jones reported. Meanwhile, in that same time span, the Walton family fortune grew from $73.3 billion to $89.5 billion, Bivens' research found.
"In short, it would still take a city’s worth of families with the overall median wealth to match the Walton family’s net worth," Bivens writes.