When we analyzed the behavior of 30,000 managers, as seen through the eyes of some 300,000 of their peers, direct reports, and bosses on 360-degree evaluations, we found that the sins of the bad boss are far more often those of omission, not commission. That is, bad bosses are defined not so much by any appalling things they do as by certain critical things they don’t do.

via Are You Sure You’re Not a Bad Boss? – Jack Zenger and Joseph Folkman – Harvard Business Review.