SAMUEL DAVID EPSTEIN is a Professor in the Linguistics Department at the University of Michigan. He is co-author of A Derivational Approach to Syntactic Relations (with E. Groat, R. Kawashima and H. Kitahara, 1998), and co-editor (with N. Hornstein) of Working Minimalism (1999). He is co-founder ( with S. Flynn) of the journal Syntax.