Institution: | (1) Department of Probability and Mathematical Statistics, Charles University, Sokolovská 83, 186 75 Prague, Czech Republic;(2) UBM UniCredit Banca Mobilaire, Via T. Grossi 20, I-20102 Milano, Italy;(3) Department of Industrial Economics and Technology Management, Norwegian University of Science and Technology, N-7491 Trondheim, Norway |