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《China Population Resources and Environment》 2010-01
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Convergence of Energy Intensities:Test for Developed Countries and Developing Countries

WEI Wei-xian1 WANG Feng2(1.Research Center for Energy Economics,University of International Business and Economics,Beijing 100029,China;2.China Center for Energy Economics Research,Xiamen University,Xiamen Fujian 361005,China)  
Energy intensity is the amount of energy required to generate a unit of economic output in a country or a region.It indicates the energy efficiency as well as how economic system depends on energy.Many countries' energy intensity curves significantly show convergent tendency.In order to prove and test the phenomenon,this article firstly proposes the definition of the convergence of the energy intensities according to the cointegration concept of time series,and then uses an endogenous growth model including energy input to prove the existence of the convergence of the energy intensity in theory.In order to test the proposition,24 countries are selected and divided into five groups of samples which are analyzed by the σ convergence test and the cointegration technology.The conclusions can be drawn that energy intensities are converging in the high-income countries,the upper-middle-income countries,the lower-middle-income countries,the developing countries and all countries in the sample;the σ convergence test reveals how the energy intensity in the five samples converged.This study not only theoretically proves a law about the energy intensity but also has a certain reference value to the implementation of the sustainable development strategy and the policy to reduce energy intensity.
【Fund】: 国家社科基金资助项目(07BJY065);; 国家自然科学基金资助项目(70671086);; 教育部新世纪优秀人才支持计划(NCET-07-0727);; 对外经济贸易大学211工程第三期项目阶段性成果
【CateGory Index】: F206;F224
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