Big Brands Flock to Twitter, Upending Ad Industry

March 25 (Bloomberg) -- Jon Erlichman takes a look at the business behind Twitter. He speaks on Bloomberg Television's "Bloomberg West." (Source: Bloomberg)
Roubini: Combination of Factors Weighing on Commodities
32:31 - Roubini Global Economics Chairman Nouriel Roubini talks about the factors affecting commodity prices and the reduced pricing power of OPEC. He speaks on "Bloomberg Surveillance." (Source: Bloomberg)
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