None. Zero. Nada. Zilch.
Twenty-three studies found a negative relationship between taxes and growth, by contrast, while three studies didn’t find any relationship.
The Tax Foundation report concludes with the following.
In sum, the U.S. tax system is a drag on the economy. Pro-growth tax reform that reduces the burden of corporate and personal income taxes would generate a more robust economic recovery and put the U.S. on a higher growth trajectory, with more investment, more employment, higher wages, and a higher standard of living.
In other words, America would be more prosperous with a simple and fair system such as the flat tax."