1. Jose M. Pavia is Lecturer in Statistics, Department of Applied Economics, University of Valencia, 46022 Valencia, Spain . Beatriz Larraz is Assistant Professor in Statistics, Faculty of Ciencias Juridicas y Sociales, Castilla-La Mancha University, 45071 Toledo, Spain . Jose M. Montero is Professor in Statistics, Faculty of Ciencias Juridicas y Sociales, Castilla-La Mancha University, 45071 Toledo, Spain . The authors thank two anonymous referees, an associate editor, and especially the editor, David...