I PROCEEDINGS OF THE 11 TH INTERNATIONAL CONFERENCE OF DEA DEA2013, JUNE 2013, SAMSUN, TURKEY DATA ENVELOPMENT ANALYSIS AND PERFORMANCE MEASURMENT Proceedings of the 11 th International Conference of DEA EDITED BY: Rajiv Banker, Ali Emrouznejad, Hasan Bal, Ihsan Alp, Mehmet Ali Cengiz