Conversation so far:
Where did Galbraith grow up?
Galbraith was raised in Dunwich Township, Ontario.
Where did John Galbraith go to school?
John Galbraith attended Dutton High School and St. Thomas High School and Ontario Agricultural College, which was then an associate agricultural college of the University of Toronto.

Question: What did he study?
Self-contained rewrite: What did John Galbraith study?