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 Three Reasons Why the Birth of Publicis Omnicom Is Good for Small Agencies Small Agencies Rallying as the Big Get Bigger By Adam Kleinberg, Published on July 31, 2013 13 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.