The world is full of famous entrepreneurs from Steve Jobs to Bill Gates and Richard Branson or Martha Stewart. But few of them have done more in a business school than “to deliver a speech”, muses “The Economist” about the belief held by those same schools that they can teach entrepreneurship. After all, many in the business community suspect that the impulse to start and run a business has more to do with genetics than classroom experience. A recent study now confirms these intuitive beliefs.