easing overall growth. (13) David Card, Thomas Lemieux, and Craig Riddell, "Unions and Wage Inequality," December 2004; "Interview with David Card," Federal Reserve Bank of Minneapolis, Dec. 1, 2006 (14) "Capital," Thomas Piketty (15) CBO, 2011 (16) CBO, 2011 (17) CBO, 2013 (18) CBO, 2013 (19) CBO, 2013. The CBO noted that other t