List of Articles Two-Stage Data Envelopment Ana Open Access Article Abstract Page Full-Text 1 - Efficiency Evaluation of Two-Stage Data Envelopment Analysis Model Based on Triangular Intuitionistic Fuzzy numbers andslack variables nafiseh javaherian Ali Hamzehee Hossein sayyadi Tooranloo Reza Soleymani-Damaneh Open Access Article Abstract Page Full-Text 2 - Performance Measurement of Decision Making Units with Network Structure in the Presence of Undesirable Output P. Peykani E. Mohammadi Open Access Article Abstract Page Full-Text 3 - Evaluating the Effect of Cost of Environmental Pollution on Efficiency (Case study: China's economic zones) fatemeh Mehregan Soheyla Seyedboyer 10.22034/jest.2019.29384.3870 Open Access Article Abstract Page Full-Text 4 - Analysis of the legislative and supervisory performance of different periods of the Islamic Parliament using two-stage data envelopment analysis Ahmad Ghanbarian Boroojeni kambiz Shahroodi Alireza Amirteimoori mehrdad Goodarzvand Chegini