1. COPPEAD Graduate Business School; Federal University of Rio de Janeiro; Rua Paschoal Lemme, 355 21949-900 Rio de Janeiro Brazil
2. Department of Applied Statistics, Faculty of Economics and Administration; University of Malaya; 50603 Kuala Lumpur Malaysia
3. ULisboa and CEsA - Research Centre on African, Asian and Latin American Studies; ISEG - Lisbon School of Economics and Management; Rua Miguel Lupi, 20 1249-078 Lisbon Portugal
4. Department of Mathematics, Isfahan (Khorasgan) Branch; Islamic Azad University; Isfahan Iran