Gregory Riordan Guy (born August 23, 1950)[1] is a linguist who specializes in the study of language variation and language diversity, including sociolinguistics, historical linguistics, phonetics, and phonology.
[2] His Ph.D. dissertation described syntactic change in spoken Brazilian Portuguese.
[3] Guy is now a Professor of Linguistics at New York University and has taught at Sydney, Temple, Cornell, Stanford, and York University in Toronto, Canada,[4][1] and at Institutes of the Linguistic Society of America (1993, 1997, 2003, 2007) and the Associação Brasileira de Lingüística (1999, 2005).
He has conducted research on Brazilian Portuguese, Australian and American English, and Dominican and Argentine Spanish.
Notable publications include Towards a Social Science of Language and a series of papers in the journal Language Variation and Change dealing with linguistic variation and phonological theory.