Paul Kay is professor emeritus of linguistics at the University of California, Berkeley and adjunct professor of linguistics at Stanford University. Laura Michaelis is professor of linguistics in the Department of Linguistics at the University of Colorado Boulder and a Faculty Fellow at the Institute of Cognitive Science. She was a founding editor of the Cambridge University Press journal Language and Cognition: An Interdisciplinary Journal of Language and Cognitive Science . Ivan A. Sag (1949-2013) was professor of linguistics at Stanford University. He was the author of Syntactic Theory , 2nd Edition, German in Head-Driven Phrase Structure Grammar , Interrogative Investigations , Sign-Based Construction Grammar , and Head-Driven Phrase Structure Grammar . Dan Flickinger was a senior research associate at the Center for the Study of Language and Information, Stanford University and coeditor of Collected Papers of Martin Kay .