"Roy Brouwer, the executive director of the Water Institute and a professor of economics at University of Waterloo, said that the report was a call to action. He added that he does not work with the economic model that GHD used in their methodology and was unfamiliar with it."<p>The best possible interpretation of this is that Professor Brouwer was asked for an opinion as a person on the street who had the good sense to include a disclaimer: "not my area of expertise as an economics professor".