Many have observed that individuals perform worse after having received a promotion. The most famous statement of the idea is the Peter Principle, which states that people are promoted to their level of incompetence. There are a number of possible explanations. Two are explored. The most...

Entrepreneurship requires energy and creativity as well as business acumen. Some factors that contribute to entrepreneurship may decline with age, but business skills increase with experience in high level positions. Having too many older workers in society slows entrepreneurship. Older workers...