David Zax interviews Israeli venture capitalist Jacob Burak, author of bestsellers Do Chimpanzees Dream of Retirement and Noise. Here Burak explains the demographic make-up of successful entrepreneurs:

Blood type B is found in a much higher percentage (four times as often) in self-made millionaires than in the rest of the population. On the other hand, many of the business CEOs and the United States Presidents are first-born children. Dyslexics compose about 9% of the population while they are 30% of the entrepreneurs (the reason probably being that they have to rely on others and delegate early on in their lives because of their handicap). 

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