Dal Forno, A (Corresponding Author), Univ Molise, Dept Econ, Via F de Sanctis Snc, I-86100 Campobasso, Italy.
Avrutin, Viktor, Univ Stuttgart, Inst Syst Theory & Automat Control, Pfaffenwaldring 9, D-70550 Stuttgart, Germany.
Dal Forno, Arianna, Univ Molise, Dept Econ, Via F de Sanctis Snc, I-86100 Campobasso, Italy.
Merlone, Ugo, Univ Torino, Ctr Log Language & Cognit, Dept Psychol, Via Verdi 10, I-10124 Turin, Italy.