Conversation so far:
Where is Libby from?
in New Haven, Connecticut.
Where did he grow up?
Libby graduated from the Eaglebrook School, in Deerfield, Massachusetts, a middle school.
Did he attend college?
He and his elder brother, Hank, a retired tax lawyer, were the first in the family to graduate from college.
Where did attend college?
Libby matriculated at Yale University in New Haven, Connecticut.

Question: what did he study?
Self-contained rewrite: what did Scooter Libby study at Yale ?