TORONTO - Canada’s radio industry has launched a national $2-million “return on investment” ad campaign with testimonials from national advertisers such asch Grolsch, Goodyear and Nestlé. The campaign, entitled “AM + FM = ROI”, will use national print ads, advertising trade publications and has the support of the Radio Marketing Bureau’s 385 member radio stations. “This is an unprecedented effort by our industry to reinforce the effectiveness of radio and the tangible return on dollars invested,” said John Harding, president, RMB. “Our intent is to drive interest and investment in radio by providing testimonials from prestigious national advertisers… supported by...