You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Marketers, Get Serious About Accountability There's Still Much Work to Do to Prove Marketing Dollars Are Measurably Contributing to the Business By Bob Liodice, Published on September 08, 2008 0 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.