关键词: 能源强度, 结构分解技术(SDA), 投入产出, RAS法

Abstract: The authors use the structural decomposition method to develop the energy intensity decomposition model and to decompose energy intensity into five determinants: energy consumption coefficient, Leontief inverse coefficient, final demand structure, final demand level, and final energy consumption coefficient. Then the RAS method is used to decompose energy consumption coefficient and Leontief inverse coefficient into changes both in structure and efficiency. Empirical study is carried out on the constant price energy-input-output tables from 1987 to 2005. One main conclusion is that between 1987 and 2002, input structure accounts for most of the decline in energy intensity. However, the total demand of production per unit final demand and final demand structure explain the energy intensity increase between 2002 and 2005.

Key words: energy intensity, structural decomposition method, input-output technology, RAS method