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The research is an attempted to estimate the Nile Blend crude oildemand function to investigate the real factors which are determined the NBcodemand in far east market (Japan - China - Korea) during the period 1999-2006, aims to point out the main factors influencing the demand of NBco. Depending on these objectives the study used four variables as anexplanatory variable influence demand for NBco, which are the price of NBcothe price of the Indonesian crude oil (MINAS), the API gravity factor as an aquality component with SULFURE CONTENT. Assume that the demand ofNile Blend crude oil is inelastic and there is a positive relationship betweenNBco demand and quality component consisting of API gravity and negativewith sulfur content The ordinary least square (OLS) method has been applied to estimate thecoefficient, using monthly data for the period 2000-2007 (Sudanese PetroleumCorporation) to formulate the Nile Blend crude oil demand function in Far-Eastmarket is specified by the multi-variable partial adjustment equation. The estimated results show that for the price elasticity of Nile Blendcrude oil demand is elastic, and there is negative relationship between minascrude oil price and Nile Blend demand. The other explanatory variables whichare API and the SULFUR CONTENT both are not significant, when we usedthem in the estimation But when we used in other attempting by using partialadjustment model only for the NBco price and the sulfur content we foundthem are significant and matching the hypotheses. The study recommend that the Sudanese petroleum corporation mustconcentrated on the Far-East market strategically because there are about 90%of Nile Blend crude oil exports to the far-east, also more research in the impactof the oil industry is mainly needed in this field on the economic performance.