Evaluating the Industrial Concentration of Iranian Manufacturing Industries based on Stochastic Dominance Approach

Document Type : Review Article

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Abstract

In this paper, for ranking Herfindahl-Hirschman concentration factor in Iran's industries is used first, second, and third stochastic dominance approach. Features of this approach in industry-exclusive ranking is that can be used from features of probability functions and indicators inferred in order to the market structure analysis. Stochastic dominance is known as a form of random ranking which in that is used for the probability density functions and probability distribution functions to a comprehensive evaluation of the characteristics of a variable. This approach, widely used in decision theory and analysis to decision-making. This approach, widely used in decision theory and analysis to decision-making. All comparisons between industries based on stochastic dominance approach in this study are 8515. According to research findings for the production of the tobacco industry in terms of market concentration based on first-order stochastic dominance is dominant on 127 industries and based on second-order stochastic dominance is dominant on 1 industry and overall is dominant on 128 industries of 130 industries studied and not dominated by any industries. As a result, manufacturing industries of tobacco products on the market has the highest concentration and is the most exclusive of Iran's industry. After that Malta and alcohol-free beer industries in terms of concentrating based on first-order stochastic dominance are dominant on 123 industries and no industry in terms of concentration on the market is not dominated and in terms of concentration and market power is in second place. On the other hand, not only brick manufacturing industries aren't dominant on any industrial but the concentration in the market on the basis of first-order stochastic dominance is dominated by the 128 industries and totally is dominated by 129 industries and it can be stated that there is effective competition in this industry.

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References

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