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 Mobile Ad Industry Calls for Standards As Devices Proliferate A Confusing Array Is Holding Ad Rates Down, Trade Groups Say By John McDermott, Published on January 25, 2013 7 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. Register Now Already a member? Log in.