I understand that with your willingness to do or say anything to oppose the FairTax that you can't/won't accept that ... but there it is!!
Those studies have been shown to be misunderstood, misrepresented, and wrong. Since they were paid for by FairTax money, that is to be expected, people typically get what they pay for when studies are done for lobbyists. But when they get to the real world, no one believes them.
You are like the global warming scientists with their studies and lists of aligned scientists.