Portal:Linguistics/Featured biography/July 2008
Ivan Sag (born November 9, 1949 in Alliance, Ohio) is a professor of linguistics at Stanford University.
With Carl Pollard, he has written several books that introduce and develop the syntactic theory known as head-driven phrase structure grammar (HPSG). He was also involved with work on generalized phrase structure grammar, HPSG's immediate intellectual predecessor. In addition, he has written numerous articles on problems of linguistic theory and analysis.