Judith Jarvis Thomson works in ethics and metaphysics. Her book, The Realm of Rights (Harvard University Press, 1990) is a study of the questions what it is to have a right, and which ones we have. An article entitled "Self-Defense" appeared in Philosophy and Public Affairs (Fall 1991); another entitled "On some ways in which a thing can be good" appeared in Social Philosophy and Policy (Spring 1992).
Her work in metaphysics has largely been on the ontology of events, and the identity across time of people and other physical objects. An article entitled "People and their bodies," which takes issue with views expressed by Derek Parfit in Part III of his Reasons and Persons, has recently appeared in a collection of essays (edited by Jonathan Dancy) written on topics dealt with in that book. She is currently working on the question what it is for one event to cause another.