List of Articles Open Access Article Abstract Page Full-Text 1 - Measuring congestion in data envelopment analysis with common weights A.A. Noura E. Hoseini Open Access Article Abstract Page Full-Text 2 - Estimating right and left returns to scales in data envelopment analysis: A new approach M. Khoveyni R. Eslami Open Access Article Abstract Page Full-Text 3 - 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 4 - A two phases approach for discriminating efficient candidate by using DEA inspired procedure M. Zangane Open Access Article Abstract Page Full-Text 5 - Common weights for the evaluation of decision-making units with nonlinear virtual inputs and outputs S. Borzoei M. Zohrehbandian Open Access Article Abstract Page Full-Text 6 - Using MOLP based procedures to solve DEA problems P. Zamani F. Hosseinzadeh Lotfi