فهرس المقالات value creativity حرية الوصول المقاله صفحة الملخص نص كامل 1 - Application of the two-stage DEA model for evaluating the efficiency and investigating the relationship between managerial ability and firm performance Mohammad Reza Ravanshad Ali Amiri Hojjatallah Salari Davood Khodadadi 10.22034/amfa.2019.582206.1160