Companies with a female chief executive or board chair have almost twice as many female board members as those led by men, suggests research by professional services firm Deloitte. The fifth edition of Deloitte Global’s Women in the Boardroom: A Global Perspective publication found that women constituted 29% of board members in companies with a female chair or chief executive, compared to 16% with a male chair and 15% with a male chief executive. Overall, however, despite continued efforts to improve diversity, women are still largely under-represented on corporate...