A careful reader of my books will realise that I get very self-conscious when writing about entrepreneurship and starting businesses. The reason is obvious - since I do not have start-up experience, I feel unqualified to advice business people.   My confidence has grown of late. I dare say that if I every publish a fourth book, I should be able to speak quite authoritatively about running businesses.  Law school has made be used to the idea of reading research journals and my previous engineering and finance studies has always allowed me to be very comfortable dealing with statistics.   I want to follow up with my previous article on entrepreneurship to dispel a lot of folk wisdom which was thrown my way when the last article on entrepreneurship was published. My materials are drawn from a working paper from the National Bureau of Economic Research by Ross Levine and Yona ......