Notes, Comments and Preliminary results May 10 2007 Juan Gabriel Brida and Elvio Accinelli   The Ramsey model with logistic population growth   Abstract  Contact Information  Citation  Full Text  -  Note   Research announcements May 15 2007 Elvio Accinelli , Martín Puchet and Juan Brida   Structural stability in economies on Banach's spaces   Manuscript Available   Abstract  Contact Information  Citation  Full Announcement  -  Research Announcement   Conference announcements