real beauty page http://www.gewaltakademie.de/index.php/ausbildung combivent udv  Yahoo's share of the $17 billion U.S. display ad market is expected to decline to 7.9 percent in 2013, down from a 9.2 percent share last year, while Google's share is expected to grow to 17.6 percent. Facebook is likely to expand its market share to 16.5 percent, research house eMarketer estimates.