The 1990 R&D Tax Credit: A Uniform Tax on Inputs and a Subsidy for R&D
Although the R&D tax credit is viewed, in part, as the equivalent to a uniform tax on all inputs, the effect is minimal (to the extent its effect is uniform across all inputs) and creates no substitution distortions. Shows that the current system offers a greater marginal incentive for R&D than the system that was in place prior to 1990.