Measurement of Lerner index of Iran's Agro-Industries (Industrial Organization Approach)

market power of active Iran's Agro-industries. The results indicate that industries of Manufacture of nitrogenous fertilizers and nitrogen compounds, manufacture of flour mixes and prepared blended flour and dough for bread, cakes, biscuits or pancakes, Cleaning and grading and packing dates and industries of Processing and preserving of fish, crustaceans and molluscs have experienced the highest market power under the Lerner index with 0.56, 0.41, 0.24 and 0.18 values respectively among the converting industries. The findings also imply that industries of Manufacture of edible vegetable and animal oils and fats, Processing and preserving of meat, Processing and preserving of fruit and vegetables excluding date and pistachio, Manufacture of dairy products and industries of manufacture of machinery used in agriculture and forestry have had an effective competition structure while industries of Manufacture of macaroni, noodles, couscous and similar farinaceous products, Cleaning  and grading and packing dates, manufacture of flour mixes and prepared blended flour and dough for bread, cakes, biscuits or pancakes, Making tea and industries of manufacture of nitrogenous fertilizers and nitrogen compounds have had an effective monopoly structure.