Raffaella Sadun, a professor at Harvard Business School, explains why seemingly common-sensical management practices are so hard to implement. After surveying thousands of organizations across the world, she found that only 6% of firms qualified as highly well-managed \u2014 and that managers mistakenly assumed they were all above average. She is a co-author of \u201cWhy Do We Undervalue Competent Management?\u201d in the September\u2013October 2017 issue of Harvard Business Review.