FILE - In this Monday, May 9, 2011 file photo, LinkedIn Corp., the professional networking Web site, displays its logo outside of headquarters in Mountain View, Calif. Linkedin is reporting their fourth quarter 2012 earnings on Thursday, Feb. 7, 2013. (AP Photo/Paul Sakuma, File)

Associated Press
FILE - In this Monday, May 9, 2011 file photo, LinkedIn Corp., the professional networking Web site, displays its logo outside of headquarters in Mountain View, Calif.  Linkedin is reporting their fourth quarter 2012 earnings on Thursday, Feb. 7, 2013. (AP Photo/Paul Sakuma, File)
FILE - In this Monday, May 9, 2011 file photo, LinkedIn Corp., the professional networking Web site, displays its logo outside of headquarters in Mountain View, Calif. Linkedin is reporting their fourth quarter 2012 earnings on Thursday, Feb. 7, 2013. (AP Photo/Paul Sakuma, File)
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