I initially felt the same, but the paper linked makes the relevant claims in its abstract (although I'm not paying up to get the full text). http://link.spring

I initially felt the same, but the paper linked makes the relevant claims in its abstract (although I'm not paying up to get the full text). http://link.springer.com/article/10.1007/s13524-012-0157-1 http://link.springer.com/article/10.1007/s13524-012-0157-1 Also, posted by another commenter in this thread: http://newsroom.ucla.edu/portal/ucla/graduates-of-all-girls-schools-85038.aspx http://newsroom.ucla.edu/portal/ucla/graduates-of-all-girls-... It's enough for me not to dismiss the idea.