Jean-Yves Pollock is Emeritus Professor at the University of Paris-Est Marne-la-Vallée. He has previously held teaching or research positions at Paris 8 University Vincennes-Saint-Denis, the University of Rennes 2, Harvard University, and the University of Picardy Jules Verne, and as a CNRS researcher at the Institut des Sciences Cognitives Marc Jeannerod in Lyon. He specializes in comparative syntax, and has worked extensively on verb movement, the structure of the IP, impersonal sentences, questions, and relatives.