List of Articles L13 Open Access Article Abstract Page Full-Text 1 - The Relationship between Efficiency and Industrial Concentration of Food and Beverage Industries in Iran K. soheili SH. Fattahi M.S zabihi dan M. hadizadegan 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