عنوان مقاله [English]
Performance analysis and information technology industries are important economic and industrial planners. Cement industry has great role in the development and progress of the country's economic development. In the present research situation of monopoly and technological changes in the production of cement- Fars based indicators return to scale and economies of scale are investigated. For the analysis of the Translog cost function and Seemingly Unrelated Regressio (SUR) during the period 1381:1-91:12 and the seasonal data are used. According to some results, because there are increasing returns to scale and economies of scale, natural monopoly in the factory has not been excluded. Also according to the advancement of technology, the advancement of technology in this industry has been associated with lower costs.