Yahoo has officially tapped Ned Brody—who held a number of executive titles for AOL during the last decade—to run its ad sales for North America and South America. The announcement ends months of speculation that Yahoo CEO Marissa Mayer and her team were working to bring Brody to the Sunnyvale, Calif.-based Internet company. As svp of the Americas, Brody will be charged with overcoming the considerable challenge of convincing brands and agencies to spend more on Yahoo’s properties. The firm’s ad revenues have been on the decline in recent quarters because consumers ...