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 Why It's Time to Define the 'Who' in Yahoo Before Next Leader Is Named, Company Must Reconcile Exactly What It Aims to Be By Chris Copeland, Published on September 08, 2011 1 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.