WPP's Sorrell: Twitter Is Still an Unproven Medium

Nov. 7 (Bloomberg) -- Sir Martin Sorrell, CEO & founder at WPP, explains how WPP works Twitter into its advertising plans for companies and examines Twitter’s ad growth potential. He speaks on Bloomberg Television’s “Bloomberg Surveillance.”
Greece Needs to Raise Taxes Fast: Freris
12:30 - Feb. 27 -- Ecognosis Advisory's Andrew Freris discusses the prospects for reform in Greece with Bloomberg's Rishaad Salamat on "Trending Business."
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