Irene Heim is Professor of Linguistics at the Massachusetts Institute of Technology. She is the author of The Semantics of Definite and Indefinite Noun Phrases (1987) and, with Angelika Kratzer, is Founder and Editor of Natural Language Semantics.

Angelika Kratzer is Professor of Linguistics at the University of Massachusetts at Amherst and, with Irene Heim, is Founder and Editor of Natural Language Semantics.