Piper Jaffray Downgrades Arbitron (ARB) to Underweight

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Nielsen Holdings N.V. (NLSN) Buys Arbitron (ARB) for $48/Share

December 18, 2012 7:01 AM EST

Nielsen Holdings N.V. (NYSE: NLSN) announced that it has signed a definitive agreement to acquire Arbitron Inc. (NYSE: ARB), an international media and marketing research firm.

Nielsen has agreed to acquire all of the outstanding common... More