中国钢铁行业能源内部的替代弹性分析——基于超越对数生产函数

Substitution Elasticity Among Different Energy Types in Chinese Steel Industry:Based on Trans-log Production Function

本文运用中国钢铁行业滞后一期的产出代替劳动和资本变量,把钢铁行业能源投入要素分解为煤炭、石油、天然气和电力的投入,建立了一个超越对数生产函数模型,用岭回归估算了中国钢铁行业各能源品种投入要素的产出弹性、替代弹性。结果表明:煤炭与石油、煤炭与天然气、煤炭与电力的替代弹性在1左右,中国钢铁行业可通过用石油、天然气、电力替代煤炭来实现其行业全要素能源效率的提高。

In order to measure output elasticity and substitution elasticity for different types of energy in China＇s steel industry,with lag GDP deemed as a substitution variable of labor and capital,and taking coal,oil,natural gas and electricity as input factors,and taking GDP of Chinese steel as the output factor,a trans-log production function model for China＇s steel industry is established.The ridge regression approach is used to estimate the parameters for the model.Output elasticity and substitution elasticity of different types of energy are calculated.The result indicates as follows：the substitution elasticity between coal oil,and coal natural gas,and coal electricity are fluctuated around 1;total energy efficiency in China＇s steel sector can be improved by substituting oil,natural gas and electricity for coal.