The Pew Research Center found that the percentage of higher-income households living in wealthier neighborhoods doubled in the last three decades from 9 to 18 percent. That's in 27 of the 30 largest metropolitan areas. At the same time, a greater percentage of lower-income Americans live in poorer neighborhoods. Census data show that number jumped from 23 percent to 28 percent.
Paul Taylor is the executive vice president of the center and a co-author of the report.
