Do corporate tax cuts raise domestic investment without paying for themselves?
Core argument: Firms experiencing the mean tax change from the Tax Cuts and Jobs Act's corporate rate cut and full expensing increased domestic investment by 20% relative to firms with no tax change, according to administrative tax data.
This paper uses administrative tax data and a new model of global investment behavior to evaluate the TCJA corporate tax provisions and to illuminate the nature of global production. We have four main findings. First, the main domestic provisions—the reduction in the corporate rate and full expensing of investment—stimulated domestic investment substantially: firms with the mean tax change increased investment by 20% relative to firms experiencing no change. Second, novel international tax provisions that incentivized U.S. multinationals to increase their foreign tangible capital also stimulated domestic investment, indicating within-firm complementarity between foreign and domestic capital. Third, using our general equilibrium model, the long-run effects of the TCJA on domestic and total capital are 7% and 13%, respectively. Finally, higher depreciation deductions largely offset additional labor and corporate tax revenue from capital accumulation. As a result, the total effect on tax revenue over ten years, which includes dynamic feedback from growth, is within 2p.p. of the mechanical effect of a 41% decline in corporate tax collections.



