A 2006 study published in "Tax Notes" by the Beacon Hill Institute at Suffolk University and Dr. Laurence Kotlikoff estimated the FairTax would be revenue-neutral for the tax year 2007 at a rate of 23.82% (31.27% tax-exclusive). The study states that purchasing power is transferred to state and local taxpayers from state and local governments. To recapture the lost revenue, state and local governments would have to raise tax rates or otherwise change tax laws in order to continue collecting the same real revenues from their taxpayers. The Argus Group and Arduin, Laffer & Moore Econometrics each published an analysis that defended the 23% rate. While proponents of the FairTax concede that the above studies did not explicitly account for tax evasion, they also claim that the studies did not altogether ignore tax evasion under the FairTax. These studies presumably incorporated some degree of tax evasion in their calculations by using National Income and Product Account based figures, which is argued to understate total household consumption. The studies also did not account for capital gains that may be realized by the U.S. government if consumer prices were allowed to rise, which would reduce the real value of nominal U.S. government debt. Nor did these studies account for any increased economic growth that many economists researching the plan believe would occur.