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.”

Full Show: What'd You Miss? (07/25)
51:13 - Full episode of "What'd You Miss?" Guests include: BofA Merrill's Mark Cabana and Ward McCarthy, Jefferies chief financial economist. (Source: Bloomberg)
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