List of Articles Frontier Function Open Access Article Abstract Page Full-Text 1 - Assessment of Cost Effectiveness of a Firm Using Multiple Cost Oriented DEA and Validation with MPSS based DEA Subhadip Sarkar Open Access Article Abstract Page Full-Text 2 - Measuring Monopoly Power of Manufacturing Industry in Iran: Stochastic Frontier Functions Approach Farhad Khodadad Kashi Jafar Ebadi Seyed Ziaoddin Kiaalhoseini Khalil Heidari Open Access Article Abstract Page Full-Text 3 - اندازه گیری کارایی فنی مزارع کلزا و عوامل موثر بر آن در شهرستان تبریز، ایران سپیده رستمی دولت آبادی محمد قهرمان زاده Open Access Article Abstract Page Full-Text 4 - Investigation of Energy Technology Gap Ratio of Main Crops in Sari city رضا اسفنجاری کناری محمود احمدپور احمد علی کیخا Open Access Article Abstract Page Full-Text 5 - Technical Efficiency of Wheat Production in Iran: A Case Study Vali Borimnejad Toktam Mohtashami