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By some estimates, income and wealth inequality are near their highest levels in the past hundred years, much higher than the average during that time span and probably higher than for much of American history before then.

Janet Yellen's Speech At the Conference on Economic Opportunity and Inequality at the Federal Reserve Bank of Boston in Boston, Massachusetts, www.federalreserve.gov. October 17, 2014.
By some estimates, income and wealth inequality are near their highest levels in the past hundred years, much higher than the average during that time span and probably higher than for much of American history before