re: Trump's Economy Is Fantastic

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I used the phrase “charlatans and cranks” in the first edition of my principles textbook to describe some of the economic advisers to Ronald Reagan, who told him that broad-based income tax cuts would have such large supply-side effects that the tax cuts would raise tax revenue. I did not find such a claim credible, based on the available evidence. I never have, and I still don't.

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My other work has remained consistent with this view. In a paper on dynamic scoring, written while I was working at the White House, Matthew Weinzierl and I estimated that a broad-based income tax cut (applying to both capital and labor income) would recoup only about a quarter of the lost revenue through supply-side growth effects. For a cut in capital income taxes, the feedback is larger--about 50 percent--but still well under 100 percent. A chapter on dynamic scoring in the 2004 Economic Report of the President says same thing.

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“Federal revenue is lower today than it would have been without the tax cuts. There's really no dispute among economists about that,” said Alan D. Viard, a former Bush White House economist now at the nonpartisan American Enterprise Institute. “It's logically possible” that a tax cut could spur sufficient economic growth to pay for itself, Viard said. “But there's no evidence that these tax cuts would come anywhere close to that.

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