Full Professor in Quantitative Methods, Faculty of Economics and Management of Sfax, University of Sfax.

Address: Aerodrome Road km 4.5, B.P. 1088-3018, Sfax, Tunisia.

Laboratory: Research Laboratory in Competitiveness, Commercial Decisions and Internationalisation (CODECI).

E-mail address: kamel.helali@fsegs.usf.tn

Telephone number: +216 98667705. Post office: 1146. Fax: +21674279139.