Richard Hackman is apparently the guru of team dynamics, and the article link below was from another guru, Bob Sutton at Stanford. This combination means that although this post is not directly related to my usual topics, it’s worth reading for anyone in business.

Misperception #2: It’s good to mix it up. New members bring energy and fresh ideas to a team. Without them, members risk becoming complacent, inattentive to changes in the environment, and too forgiving of fellow members’ misbehavior.

Actually: The longer members stay together as an intact group, the better they do. As unreasonable as this may seem, the research evidence is unambiguous. Whether it is a basketball team or a string quartet, teams that stay together longer play together better.

Six Common Misperceptions about Teamwork – J. Richard Hackman – Harvard Business Review.