CBPP– The gaps in after-tax income between the richest 1 percent of Americans and the middle and poorest fifths of the country more than tripled between 1979 and 2007 (the period for which these data are available), according to data the Congressional Budget Office (CBO) issued last week. Taken together with prior research, the new data suggest greater income concentration at the top of the income scale than at any time since 1928.

While the recession that began in December 2007 likely reduced the income of the wealthiest Americans substantially and may thereby shrink the income gap between rich and poor households, a similar development that occurred around the bursting of the dot.com bubble and the 2001 recession turned out to be just a speed bump. Incomes at the top more than made up the lost ground from 2003 to 2005.

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