Scholarly research tells us:

THAT UNDER A FAIRTAX

-Real wages are 10.3 percent, 9.5 percent, and 9.2 percent higher in years 1, 10, and 25, respectively than would otherwise be the case. [3] 
- Disposable personal income is higher than if the current tax system remains in place:  1.7 percent in year 1, 8.7 percent in year 5, and 11.8 percent in year 10. [4]
-The economy as measured by GDP is 2.4 percent higher in the first year and 11.3 percent higher by the 10th year than it would otherwise be. [4]
-Over time, the FairTax benefits all income groups.  Of 42 household types (classified by income, marital status, age), all have lower average remaining lifetime tax rates under the FairTax than they would experience under the current tax system. [5]
-Implementing the FairTax at a 23 percent rate gives the poorest members of the generation born in 1990 a 13.5 percent improvement in economic well-being; their middle class and rich contemporaries experience a 5 percent and 2 percent improvement, respectively. [6]
- Based on standard measures of tax burden, the FairTax is more progressive than the individual income tax, payroll tax, and the corporate income tax. [7]
-Charitable giving increases by $2.1 billion (about 1 percent) in the first year over what it would be if the current system remained in place, by 2.4 percent in year 10, and by 5 percent in year 20. [8]
-The FairTax provides the equivalent of a supercharged mortgage interest deduction, reducing the true cost of buying a home by 19 percent.  [10]