[KarlInOhio]

A study of National Merit Scholarship finalists shows that firstborns are finalists more often than their multiple siblings combined

With a birth rate of 1.84, 54% of children are first born and 46% are second or later (ignoring combined families and child deaths). I would expect there to be a majority of first born winners. Plus we're naturally superior. :-)

[KarlInOhio]

Oops. I screwed up the math. I forgot that women who don’t have any babies pull down the birth rate but don’t skew towards firstborns. My math assumed one or more babies per woman.