List of Articles Open Access Article Abstract Page Full-Text 1 - Malmquist Productivity Index Based on Means of Weights for Ranking of Decision Making Units in Data Envelopment Analysis Sorena Jafarigorzin Iraj Asadi Talooki Open Access Article Abstract Page Full-Text 2 - Regional efficiency in the tourism industry based on global development indicators using data envelopment analysis Mohhamad Reza Shahriari Open Access Article Abstract Page Full-Text 3 - Analysis of returns to scale and efficiency in the financial performance of listed petrochemical companies by DEA method Saeid Rezaeilava Mirfeiz Fallah Shams Layalestani Masoud Sanei shokoofeh BaniHashemi Open Access Article Abstract Page Full-Text 4 - Calculation of non-radial efficiency of decision-making units with fuzzy data using GDEA model Atefeh Farshad Mohsen Rostamy-Malkhalifeh Open Access Article Abstract Page Full-Text 5 - Ranking all of efficient units using the proposed SBM model Mohhamad Seyfpanah 10.30495/ijdea.2022.68509.1171 Open Access Article Abstract Page Full-Text 6 - Evaluation of efficiency using the product method in two-stage systems with undesirable outputs Sepideh Vatani 10.30495/ijdea.2022.68507.1169