Headline: Art Laffer’s Unfortunate Endorsement of a State Sales Tax CartelLink: http://finance.townhall.com/columnists/danieljmitchell/2013/04/19/art-laffers-un…Publication Date: Friday, April 19, 2013Primary Source: TownhallType: new media postFormat: New MediaNature of Mention: authoredScholar: Mitchell, Daniel J.Research Area: Tax and Budget PolicySubjects: tax reform