J R Edwards is Associate Professor of Law, Tutorial Fellow of Worcester College, and Lecturer at Brasenose College, University of Oxford, UK.A P Simester is Amaladass Professor of Criminal Justice and Co-Director of the Centre for Legal Theory at the National University of Singapore.

J R Edwards is Associate Professor of Law, Tutorial Fellow of Worcester College, and Lecturer at Brasenose College, University of Oxford, UK.A P Simester is Amaladass Professor of Criminal Justice and Co-Director of the Centre for Legal Theory at the National University of Singapore.