List of Articles Cobb-Douglas Function Open Access Article Abstract Page Full-Text 1 - Analyze the Factors Affecting Labor Productivity in Producing Grapes (Case Study: Grape Growers Doshman Zeyari Region of Mamasani Township, Fars Province, Iran) Mostafa Teimoori Seyed Rooholah Mousavi Open Access Article Abstract Page Full-Text 2 - Estimating Production Function under Endogeneity: A Model Based on Data Envelopment Analysis Roghyeh Malekii Vishkaeii Behrooz Danishian Farhad Hosseinzadeh lotfi Open Access Article Abstract Page Full-Text 3 - Investigation of environmental impacts in sugar beet production and the effect of production inputs on yield and profit to cost ratio Shayan Firozi Mohammad Gholami Parshokoohi Iraj Ranjbar Davood Mohammad Zamani