A new study by the University of South Carolina finds that overqualified workers may be more likely to stay with a company longer and perform better than workers who are less qualified. The study analyzed data from the Bureau of Labor Statistics and found that workers with lower brain-power jobs were less likely to express dissatisfaction.The study contradicts common mentality, and also court rulings, which have held that employees can discriminate against workers who are "too smart."
See "Overqualified Workers May Be Less Likely to Quit Jobs", Randy Dotinga, Business Week, December 16, 2010