Eli Heckscher
Heckscher was born in Stockholm, son of the Jewish Danish-born businessman Isidor Heckscher and his spouse Rosa Meyer, and completed his secondary education there in 1897. He studied at Uppsala University and Gothenburg University, completing his PhD in Uppsala in 1907. He was professor of Political economy and Statistics at the Stockholm School of Economics from 1909 until 1919, when he exchanged that chair for a research professorship in economic history, finally retiring as emeritus professor in 1945. In 1929 Heckscher founded the Institute for Economic History Research.
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.