Affiliation: | A1 Institute of Mathematics and Statistics, University of Kent at Canterbury, Canterbury, Kent CT2 7NF, UK E-mail: philip.j.brown@ukc.ac.uk A2 Department of Statistical Science, University College London, London WC1E 6BT, UK E-mail: tom@stats.ucl.ac.uk A3 Department of Statistics, Texas A&M University, College Station, TX 77843-3143, USA E-mail: mvannucci@stat.tamu.edu |