Affiliation: | A1 Centre for Statistics, Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium E-mail: marc.aerts@luc.ac.be A2 Department of Statistics, Eindhoven University of Technology, Den Dolech 2, PO box 513, NL-5600 MB Eindhoven, The Netherlands E-mail: g.a.m.claeskens@tue.nl A3 Department of Statistics, Texas A&M University, College Station, TX 77843, USA E-mail: hart@stat.tamu.edu |