Donald Dewees is Professor of Economics and Law, and Vice-Dean, Faculty of Arts and Science at the University of Toronto. His teaching and research are in the areas of environmental economics, environmental law, and law and economics generally. His research has investigated economic issues related to environmental pollution policies. David Duff is a lawyer with the Toronto law firm of Stikeman, Elliott. He has published articles dealing with personal injuries, family law, and taxation, and is interested in the theory and practice of distributive justice. Michael J. Trebilcock is Professor of Law and Director of the Law and Economics Program at the University of Toronto. He has published widely in the areas of corporate and commercial law, contract law, tort law, international trade law, anti-trust law, and government regulation.