Greenspan attended the Juilliard School from 1943 to 1944. There, he studied clarinet. He eventually dropped out to join a professional jazz band.
However, in 1945 Greenspan returned to school. He attended New York University (NYU), where he received a Bachelor of Science in economics summa cum laude in 1948. Greenspan also earned a Masters of Art in economics in 1950. Intending to pursue advance economics, Greenspan attended Columbia University, but subsequently did not earn a degree there.
In 1977 NYU awarded Greenspan a Ph. D. in economics.
Greenspan’s career has been lengthy and extensive. Some of his endeavors has included working as an economic analyst at The National Industrial Conference Board from 1945 to 1953.