In a rare jump by a retail executive onto the masthead of a media outlet that covers her industry, Bobbi Brown, the makeup mogul, will take over Yahoo’s beauty section later this month, the company announced on Wednesday. As editor-in-chief of Yahoo Beauty, Brown “will lead editorial direction, original content and the expansion and re-imagination” of the section. Brown said she would keep her role at her cosmetics company, “confident that the two positions will inform and strengthen each other”.