JOSEPH ROSSE is an associate professor in the Graduate School of Business and Administration at the University of Colorado at Boulder. He has authored numerous articles and book chapters related to work performance, most specifically in the areas of employee selection, turnover, and drug testing. Rosse is also the co-author, with Robert Levin, of the monthly newspaper column ?On Management,? which addresses the human side of managing a business. ROBERT LEVIN is director of the Center for Human Function and Work, a University of Colorado at Boulder Research Park organization. He has authored and edited numerous articles and training materials on performance in the workplace, performance development, and coaching, and has developed selection and training systems for both private and public sector organizations.