I meant that it appears to be random (or even anti-intuitively correlated) if you look at one factor only: I believe you need both genetics and environment. Th

I meant that it appears to be random (or even anti-intuitively correlated) if you look at one factor only: I believe you need both genetics and environment. The anti-intuitive thing is what others have said: migrants are bolder (entrepeneurish) or they have some requested talent.