First of all, I am the youngest of my Mother's children... so this isn't easy for me to say...
First born children tend to have higher IQs. (only by 3 points)
But fear not second borns... you tend to be taller. Yay!
(not in my case)
Well, my older brother is a lawyer... so he may be making those extra 3 IQ points work for him.
You can see that full article HERE