Given this paragraph about composer Paul Lansky, did he have an advanced degree?

Paul Lansky (born 1944) is an American composer. He was educated at Manhattan's High School of Music and Art, Queens College and Princeton University, studying with George Perle and Milton Babbitt, among others. He received his Ph.D. in music from Princeton in 1973. His doctoral dissertation consisted of an essay titled "Affine music" and a composition of string quartet.Originally intending to pursue a career in performance, during 1965–66 he played the French horn with the Dorian Wind Quintet. He left the group to attend graduate school. From 1969 until his retirement in 2014 he was on the faculty at Princeton University where he retired as the William Shubael Conant Professor of Music.

Yes. Paul Lansky graduated from Princeton University with a Ph.D in music.