Groupon CEO Andrew Mason Speaks At The Mobile Loco...

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Andrew Mason, chief executive officer at Groupon Inc., speaks during... NyhetsfotoAmerika,CEO,Finansväsen,Groupon,Horisontell,Inledningsanförande,Internet,Kalifornien,Möte,Nordamerika,Prata,San Francisco - Kalifornien,Seminarium,Tal,Teknologi,USA,WebbsidaPhotographer Collection: Bloomberg 2012 BloombergAndrew Mason, chief executive officer at Groupon Inc., speaks during a keynote address at the Mobile Loco conference 2012 in San Francisco, California, U.S., on Tuesday, Dec. 11, 2012. After sinking 79 percent this year Groupon Inc., the online-coupon service, is now valued at $2.8 billion and last month fetched a record low price-sales ratio, according to data compiled by Bloomberg. Photographer: David Paul Morris/Bloomberg via Getty Images