Robert Barro on the Tax Bill

My colleague Robert Barro is enthusiastic about the recently passed tax bill. You can read his analysis of it here. His bottom line:

I estimate that the total tax package will create extra GDP growth of 1.1% a year through 2019. The main effect (0.8%) comes from changing the individual tax code, with the remainder from the corporate reform. Over the following eight years, the projected growth rate rises by 0.2 to 0.3 percentage point a year because of the law’s expansionary effects on long-run capital and GDP per worker.