John J. McCarthy is Professor of Linguistics at the University of Massachusetts, Amherst. His widely cited but unpublished manuscript "Prosodic Morphology I: Constraint Interaction and Satisfaction" (with Alan Prince, 1993) has been an important factor in the dissemination of Optimality Theory.He is also the author of Formal Problems in Semitic Phonology and Morphology (1985), A Thematic Guide to Optimality Theory (2002), and Hidden Generalizations: Phonological Opacity in Optimality Theory (2007), as well as the editor of Optimality Theory in Phonology: A Reader (Blackwell, 2004).