If you're the firstborn in your family, you have the right to brag! According to Simplemost, there is a new study out that proves that the firstborn child in the family is the smartest!
And another study found that firstborn daughters are more AMBITIOUS!
To what does it boil down to? Mom & Dad! Firstborns get more of their attention because there isn't another kiddo to care for yet so they put all their energy towards that kid - learning what it's like to be a new parent and so forth too. It's a learning experience for everyone.