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Ivan A. Sag (PhD, MIT 1976) is the Sadie Dernham Patek Professor in Humanities and Professor of Linguistics and Symbolic Systems at Stanford University. He is also a Senior Researcher at Stanford's Center for the Study of Language and Information (CSLI) and a fellow of the American Academy of Arts and Sciences and the Linguistic Society of America.
Sag was one of the originators/developers of Generalised Phrase Structure Grammar (GPSG), Head-Driven Phrase Structure Grammar (HPSG), and Sign-Based Construction Grammar (SBCG). He has worked on numerous syntactic problems and has also made contributions in semantics, experimental and computational linguistics, phonology, and the study of discourse. Focusing on issues at the morphology/syntax and syntax/semantics interfaces, his current research primarily concerns constraint-based, lexicalist models of grammar, specifically construction grammars, and their relation to theories of language processing.
Born and raised in Alliance, Ohio, Sag attended The Mercersburg Academy in Mercersburg, PA before he was unceremoniously expelled (story here). He began his linguistic career studying Indo-European and Sanskrit at the University of Rochester (BA - 1971) and the University of Pennsylvania (MA - 1973). His interest in grammatical theory led him to study at MIT (PhD - 1976). Sag was Assistant Professor at the University of Pennsylvania (1976 - 1979) before joining the faculty at Stanford (1979 - now), broadening his interests to include model-theoretic semantics, discourse, and language processing.
Sag is Professor Honoris Causa at the University of Bucharest (Romania, 2001), a recipient of the Dean's Teaching Award (Stanford, 1982) and has been a fellow at the Center for Advanced Study in the Behavioral Sciences (Stanford, 2002-2003), in the Research School `Logica' (Utrecht, 1994), an Ameritech Fellow (Chicago, 1987-88), and a Mellon Fellow (Stanford, 1978-79). In 2005, he was awarded the LSA's Victoria Fromkin Prize, for distinguished contributions to the field of linguistics and in 2011 he held the Edward Sapir Professor at the LSA's Linguistic Institute at UC Boulder. He also serves on the editorial board of various journals, including Journal of Linguistics, Linguistics and Philosophy, Semantics and Pragmatics, French Review of English Linguistics, Journal of Language Modelling, and Constructions.
Sag is the founder of Dead Tongues, the unofficial rock and roll band of the Stanford Linguistics Department.