In a 2002 study, economists Richard Vedder and Lowell Gallaway calculated the burden that labor unions had on American economic productivity. They found that between 1947 and 2000, 'the economic cost of unions' in cumulating lost income, investment, and output was $73 trillion. That’s more than the gross world product last year.Dunno, but that sounds awfully inflated or made up to me, and I'm no fan of the EFCA. Berman gets in some licks of his own, of course, but he doesn't reveal his source when he claims that the top ten most unionized states achieved just two-thirds the job growth of the top ten least unionized states from 1997-2007. This is all good stuff in the arsenal of weapons to be used against the EFCA, but I doubt any Democrats will be listening in Congress. Are you listening, filibuster-killer Arlen Specter?