Technical Efficiency and Productivity of Senegalese Banks : an application by the Data Envelopment Analysis method (DEA) Auteur: Moussa DIOP et Aliou Niang FALL Article: Technical Efficiency and Productivity of Senegalese Banks : an application by the Data Envelopment Analysis method (DEA) Revue: OSR Journal of Economics and Finance (IOSR-JEF) Année: 2022