Evaluating the Energy Efficiency of the Companies Admitted to Tehran Stock Exchange (A Case Study: Cement Industry)

In this paper, the efficiency of Cement industry firms Listed on Tehran Stock Exchange is evaluated, by using data envelopment analysis. The survey population includes 23 firms using Tehran stock exchange data. In this paper, inputs and outputs of DEA are determined through selecting the most important criteria. Inputs include: cost of fuel (gasoline, mazut and …), cost of natural gas, cost of electricity and cost of water. Outputs include net sells, increasing (decreasing) on finished products, increasing (decreasing) on products in process, and the benefits of investments. On basis of existing data the efficiency of each firm was calculated using DEAP2 software. At last, the most efficient firms were introduced as patterns. Through comparison inefficient firms could come closer to patterns and reach the efficiency level.