The Relationship among Technology Progress,Structure Change and Energy Efficiency of US

Firstly, this paper analyzes the influence of technology progress, economic structure and energy price to energy consumption and energy efficiency, and then establishes the foundation of energy efficiency, puts forward the measure method of RD knowledge stock and survey RD knowledge of American from 1957 to 2004. Then, take the time series of US energy productivity, RD knowledge technology stock, tertiary industry proportion and petroleum price from 1980 to 2004 as the sample data, the regression analysis indicates the US structural change to be most remarkable to the energy efficiency influence. And the Granger causal relation examination shows that the above factors are the reasons for the energy efficiency, moreover there is the bidirectional causal relation between technology progress and energy efficiency.