Institution: | (1) Faculty of Computer Science, “Al.I. Cuza” University, 16 Berthelot St., 6600 Iaşi, Romania., RO;(2) CentER and Department of Econometrics and Operations Research, Tilburg University, P.O. Box 90153, 5000 LE Tilburg, The Netherlands., NL;(3) Current address: Faculty of Mathematical Sciences, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands (e-mail: j.b.timmer@math.utwente.nl), NL |