I've followed several female CEOs over the years. Most of them failed, largely because they were both unqualified for the job and their boards didn't back them up. In several cases, the board and the CEO seemed to be in conflict, or the board simply didn't do anything. Those failures have created the impression that female CEOs are a bad bet. However, I believe the real problem is that boards haven't been doing their jobs. I think women would make better CEOs than men if they were trained and supported as well.