جستجوی مقالات مرتبط با کلیدواژه "لوله سازی" در نشریات گروه "اقتصاد"

Pipe is one of the main tools for transforming gas, oil and oil commodities in oil industry. For this reason pipe production, import and export are of greate importance. The main pipe producer in Iran is Ahvaz pipe Mills Company. Therefore, the main pipe production function has been estimated during 1979-2002 using Engle-Granger co-integration method and error correction model. The findings of the research show that the Cobb-Douglas mode fits data better than other models. The speed of error correction of the model equals -0.96. The elasticity of labour is 0.58 and that of capital is 0.53 which indicate increasing returns to scale. The findings also show that regarding the current production and domestic demand, pipe export strategy cannot be the main priority of the company in short term. But in long term, when the domestic consumption is fulfilled, pipe export to neighbor countries based on consumer-oriented approach can be considered as one of the main priority of the company.

Due to the importance of production of pipes in oil and gas industries, the estimation of oil and gas pipe production function is of great interest. To this end, Ahvaz pipe mill, the largest pipe mill in Iran, has been chosen as a case study and its production function during 1979-2003 has been estimated. This estimation is based on time-series techniques, using unit root tests, cointegration and error correction models. The results suggest that Cobb-Douglas production function is more compatible with theory of production function & the data than alternative specifications. The imperical findings show that the error correction term is 0.96, labour elastisity and capital elastistiy are 0.58 and 0.53, respectively. The wald test result indicate that there is increasing return to scale.