Amanda Goodall, a senior lecturer at Cass Business School in London, argues that the best leaders are technical experts, not general managers. She discusses her research findings about doctors who head up hospitals, scholars who lead universities, and all-star basketball players who go on to manage teams. She also gives advice for what to do if you’re a generalist managing experts or an expert managed by a generalist. Goodall is the co-author of the HBR articles “If Your Boss Could Do Your Job, You’re More Likely to Be Happy at Work” and “Why the Best Hospitals Are Managed by Doctors.”