A.P. Balcerzak, Department of Economics, Nicolaus Copernicus University in Torun, Poland,  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Zoe Georganta, Department of Applied Informatics, University of Macedonia, Greece,   This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Dr. H.M. Ertugul, Senior Treasury Expert at Undersecretariat of Turkish Treasury, Turkey,   This e-mail address is being protected from spambots. You need JavaScript enabled to view it

D. Kenett, Department of Physics, Boston University, USA,  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

M. Medo, Physics Department, Fribourg University, Switzerland This e-mail address is being protected from spambots. You need JavaScript enabled to view it

T.D. Pantos, Accounting & Finance College of Business, San Jose State University, USA, This e-mail address is being protected from spambots. You need JavaScript enabled to view it

S.G. Stavrinides, Department of Electrical and Computer Enginnering, University of Cyprus, Cyprus, This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Kadir Tuna, Department of Economics, Istanbul University, Turkey,  This e-mail address is being protected from spambots. You need JavaScript enabled to view it