J. Richard Harrison Associate Professor of Organizations, Strategy, and International Management at the University of Texas, Dallas. Glenn R. Carroll is Laurence W. Lane Professor of Organizations at the Graduate School of Business, and (by courtesy) Professor of Sociology at Stanford University. He is also Professor in the Management Division of the Graduate School of Business, and (by courtesy) Professor of Sociology at Columbia University. He is coauthor of "The Demography of Corporations and Industries" (Princeton).