1. Anthony C. Atkinson is Emeritus Professor, Department of Statistics, London School of Economics, London WC2A 2AE, United Kingdom
2. Marco Riani is Full Professor, Dipartimento di Scienze Economiche e Aziendale and Interdepartmental Centre for Robust Statistics, Università di Parma, 43100 Parma, Italy
3. Aldo Corbellini is Senior Lecturer, Dipartimento di Scienze Economiche e Aziendale and Interdepartmental Centre for Robust Statistics, Università di Parma, 43100 Parma, Italy