Psychologist: We asked 100 entrepreneurs and 100 business managers to answer various questions and rate how confident they were that their responses were correct  While members of each group were overconfident, in general the entrepreneurs were much more so than the business managers
This indicates that people who are especially overconfident are more likely to attempt to start a business in spite of the enormous odds against success than people who are less confident
The business managers who were most overconfident were found to have attempted to start businesses in the past.