عنوان مقاله [English]
In this paper, the substitution between consumable fuels in electricity production in six selected regional electricity companies during the years 1389- 1386 was calculated and evaluated. Fuels cost share equations was estimated using the unrelated regression equation estimator (SUR). Using the results of system estimation, the own price and cross price elasticities of different fuels was calculated. According to the results, all the price elasticities were negative and cross price elasticities were positive. The cross elasticity between natural gas and gasoline was 1.56 and between natural gas and mazut was 1.3. Also, using the calculated elasticities, the substitution policies of fuels with the aim of reducing CO2 emissions, was pplied. The application results showed that the substitution of mazut with natural gas, would reduce CO2 emissions, but the substitution of gasoil with natural gas would increase CO2 emissions.