Dr. Torrance is Professor Emeritus at McMaster University, Canada, and Principal Consultant for i3 Innovus, a global leader in health economics, outcomes and data analysis. He has been a leading researcher, teacher and practitioner in the field of health economics and outcomes research for over three decades. As a methodologist, Dr. Torrance pioneered many of the methods used today in health economics, particularly the use of utility theory to measure preferences for health outcomes, and the concept of quality-adjusted life years and their use in cost-utility analyses. In addition he and his colleagues developed the widely applied Health Utilities Index. As a teacher, Dr. Torrance has trained generations of researchers and practitioners through courses, workshops, journal articles, textbooks including the ISPOR Book of Terms, and through mentorship of junior and senior colleagues and students. As a practitioner, the results of studies conducted by Dr. Torrance have laid a foundation for evidence-based medicine and health policy and contributed to a more efficient allocation of resources in healthcare. Dr. Torrance is truly one of the pioneers in our field.