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 History Lesson: A Timeline of Ad Agency Consolidation Flurry of Deals in the '80s Carved Out the Current Landscape By Catherine Wolf, Published on August 06, 2013 4 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.