A rather amusing survey carried out by CBA consulting has suggested that men who gain an MBA are more likely to go bald than those that haven't. Apparently there could be a link between high testosterone and baldness, and similarly for men who are ambitious - a trait likely to influence the likelihood of gaining an MBA.
I'm not sure whether I needed to know this or not - is it going to affect the selection procedure; will it affect GMAT scores? Whatever, I don't think it will make much difference to my perception of good managers.