List of Articles Decision-making unit Open Access Article Abstract Page Full-Text 1 - Finding Common Weights in Two-Stage Network DEA Mohammad Reza Mozaffari mehrnoosh khazraei Open Access Article Abstract Page Full-Text 2 - Predicting the Efficiency of Decision-Making Unit by Using Piecewise Polynomial Extrapolation in Different Times G.R. Jahanshahloo M. Naghavi J. Saeidian H. Azada Open Access Article Abstract Page Full-Text 3 - A Data Envelopment Analysis Model with Interval Data Using TOPSIS Technique Hossein Azizi Alireza Amirteimoori Sohrab Kordrostami Open Access Article Abstract Page Full-Text 4 - Evaluating the Production Materials Suppliers of Saipa Industrial Group by Using Data Envelopment Analysis(DEA) A. Javadinia A. Gholam Abri