Clark, whose grandfathers were migrants to Scotland from Ireland, after studying at Holy Cross High School in Hamilton earned his B.A. in economics and philosophy at King's College, Cambridge in 1979 and his Ph.D. at Harvard in 1985.
Clark, whose grandfathers were migrants to Scotland from Ireland, was born in Bellshill, Scotland. After school he earned his B.A. in economics and philosophy at King's College, Cambridge in 1979 and his Ph.D. at Harvard in 1985.