Former Treasury Secretary Larry Summers made his distaste for the Trump administration’s tax framework clear last week when he said Republicans were using “made-up” claims about the plan and its effects. Summers expanded his criticism on Tuesday in a blog post that took aim at the report released Monday by the Council of Economic Advisers and chair Kevin Hassett, which seeks to justify the administration’s claim that its tax plan will result in a $4,000 pay raise for the average American family.

Never one to mince words, Summers says the CEA analysis is “some combination of dishonest, incompetent and absurd.” The pay raise figure is indefensible, since “there is no peer-reviewed support for his central claim that cutting the corporate tax rate from 35 to 20 percent would raise wages by $4000 per worker.” In the end, Summers says that “if a Ph.D student submitted the CEA analysis as a term paper in public finance, I would be hard pressed to give it a passing grade.”

One of the authors cited in the CEA paper also has some concerns. Harvard Business School professor Mihir Desai tweeted Tuesday that the CEA analysis “misinterprets” a 2007 paper he co-wrote on the dynamics of the corporate tax burden. Desai’s research has found a connection between business tax cuts and wage growth, but not as large as the CEA paper claims. “Cutting corporate taxes will help wages but exaggeration only serves to undercut the reasonableness of the core argument,” Desai wrote.