issue 3 publication date 2019-07-01

• Determination of right/left return to scale in two-stage processes based on dual simplex
• Assessing the undesirable cost imposed on the system with fuzzy DEA
• Allocating Fixed Costs: A Goal Programming Model Based on Data Envelopment Analysis
• Target setting in the process of merging and restructuring of decision-making units using multiple objective linear programming
• The overall efficiency and projection point in network DEA
• Efficiency evaluating and improvement by using the network SBM-DEA model with undesirable output: A case study of Iranian airlines