The theory of supply and demand is one of the most important content of Economics is built on the basis of the model of supply and demand. Supply and demand model is a simple song tool very helpful in general economic analysis and petroleum in particular. Supply and demand model describes the interaction between producers and consumers to determine the price and production of oil are traded on the market. In addition, the model of supply and demand also helps us understand the impact of the Government's policy for petroleum goods.
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