Gunnar Heckscher
Heckscher was born in Djursholm, son of economist Eli Heckscher. He graduated from Uppsala University in 1927 and obtained a PhD 1934. He lectured in political science at Uppsala between 1933 and 1941 and at what later became Stockholm University between 1941 and 1948. He was Dean of the Social Institute of Stockholm 1945-1954. He became a professor in 1948 and worked at both the Social Institute and at Stockholm University.
Billy Joel
Joel attended Hicksville High School until 1967, but he did not graduate with his class. He had been playing at a piano bar to help his mother make ends meet, which interfered with his attendance; specifically, he missed a crucial English exam, after playing a late-night gig at a piano bar the evening before. Although Joel was a comparatively strong student, at the end of his senior year he did not have enough credits to graduate. Rather than attend summer school to earn his diploma, Joel decided to begin a career in music: "I told them, 'To hell with it. If I'm not going to Columbia University, I'm going to Columbia Records, and you don't need a high school diploma over there'." Joel did eventually sign with Columbia. In 1992, he submitted essays to the school board and was awarded his diploma at Hicksville High's annual graduation ceremony, 25 years after leaving.