Donald A.R. George is Senior Lecturer in Economics at the University of Edinburgh. He has been a Jean Monnet Fellow at the European University Institute in Florence, Italy, Visiting Associate Professor of Economics at Queen’s University, Canada, and Visiting Professor of Economics at the University of Canterbury, New Zealand. He has published extensively on the economics of self-management, economic dynamics, and the economics of product reliability, and is joint founding editor of the Journal of Economic Surveys. Les Oxley is Professor of Economics at the University of Canterbury, New Zealand, and Adjunct Professor at the University of Western Australia. He was formerly Senior Lecturer at the University of Edinburgh, and has held visiting positions at the Australian National University, Monash University and the University of Western Australia. He has published widely in applied econometrics and is joint founding editor of the Journal of Economic Surveys. Kenneth I. Carlaw is Senior Lecturer at the University of Canterbury, New Zealand. He received his doctorate from Simon Fraser University, Canada, and has been a Visiting Research Fellow with the New Zealand Treasury. He has published on the economics of technological change and economic growth, technology policy, and the theory of general purpose technologies.