Notes, Comments and Preliminary results Jan 05 2008 Duc Khuong Nguyen , Walid Mensi and Adel Boubaker   More on corporate diversification, firm size and value creation   Abstract  Contact Information  Citation  Full Text  -  Note   Research announcements Jan 13 2012 walid mensi   Board effectiveness, conglomerate diversification, and firm performance: the tunisian case   Accepted by: John P. Conley   Abstract  Contact Information  Citation  Full Announcement  -  Research Announcement   Conference announcements