year increased under Ford, Carter, George H. W. Bush, Clinton, George W. Bush, and Obama. The number of pages in Federal Register is however criticized as an extremely crude measure of regulatory activity, because it can be easily manipulated (e.g. font sizes have been changed to keep page count low). The apparent contradiction between Niskanen's statements and Friedman's data may be resolved by seeing Niskanen as referring to statutory deregulation (laws passed by Congress) and Friedman to administrative deregulation (rules and regulations implemented by federal agencies). A 2016 study by the Congressional Research Service found that Reagan's average annual number of final federal regulatory rules published in the Federal Register was higher than during the Clinton, George W. Bush or Obama's administrations, even though the Reagan economy was considerably smaller than during those later presidents. Another study by the QuantGov project of the libertarian Mercatus Center found that the Reagan administration added restrictive regulations — containing such terms as "shall," "prohibited" or "may not" — at a faster average annual rate than did Clinton, Bush or Obama. Greg Mankiw, a conservative Republican economist who served as chairman of the Council of Economic Advisers under President George W. Bush, wrote in 2007: 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 ... 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 about the same thing. Glenn Hubbard, who preceded Mankiw as Bush's CEA chair, also disputed the assertion that tax cuts increase tax revenues, writing in his 2003 Economic Report of the President: "Although the economy grows in response to