Is the U.S.A. attractive country for entrepreneurs?

[tomohiro]

Why are there a lot of successful entrepreneurs in the US?
Intel, eBay, Yahoo and Google... when I think about successful company
which was established by famous entrepreneurs, most of them are located in the US.
Even though I am not in the US, I am still able to find many books which focus on
American entrepreneurs as successful case study.
I really would like to know what factors that America has attract entrepreneurs and
make them succeed.
Please give your point of view!!!

[Michael]

I have noticed this when interviewing successful entrepreneurs, most of them live in America! I have noticed the ones that are successful that live in Europe tend to be much more laid back and under the radar type of people.

[tomohiro]

Originally Posted by Michael

I have noticed this when interviewing successful entrepreneurs, most of them live in America! I have noticed the ones that are successful that live in Europe tend to be much more laid back and under the radar type of people.

thank you for answering!
you mean, American entrepreneurs have much entrepreneurial spirit than Europeans?