Journal of Information Systems and Technology Management, Vol 6, Iss 2, Pp 125-142 (2009) Journal of Information Systems and Technology Management; v. 6 n. 2 (2009); 125-142 Journal of Information Systems and Technology Management; Vol. 6 No. 2 (2009); 125-142 Journal of Information Systems and Technology Management; Vol. 6 Núm. 2 (2009); 125-142 Journal of Information Systems and Technology Management Universidade de São Paulo (USP) instacron:USP JISTEM-Journal of Information Systems and Technology Management, Volume: 6, Issue: 2, Pages: 125-142, Published: 2009