I know there might be some good data there, but any website citing to the Economic Policy Institute should be a red flag to economic conservatives.
The Economic Policy Institute is a liberal non-partisan [1] non-profit American think tank that was created in 1986. According to EPI's website, the institute was established to "broaden the discussion about economic policy to include the interests of low- and middle-income workers." EPI focuses on "the economic condition of low- and middle-income Americans and their families."[2] EPI researchers, who often testify to Congress and are widely cited in the media, brought to light the disconnect between pay and productivity that marked the U.S. economy in the 1990s.