Assessing eco-efficiency through the DEA analysis and decoupling index in the Latin America countries
Assessing eco-efficiency through the DEA analysis and decoupling index in the Latin America countries
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DOI：
10.1016/j.jclepro.2018.08.322
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发表时间：
2018-12-20
影响因子：
11.1
通讯作者：
Santiago, Renato
中科院分区：
文献类型：
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作者：
Moutinho, Victor;Fuinhas, Jose Alberto;Santiago, Renato
本研究是根据两步方法开发的。在第一步中，我们提供了一个恒定和可变的规模回报下的生态效率的变化的调查，而在第二步的脱钩弹性的评估将给出。能源、经济和环境决定因素（投入）对生态效率绩效指标的影响是按照碳强度（国内生产总值与二氧化碳排放量的比率，两者均来自世界发展指标数据库）、生态效率变化和二氧化碳排放量与经济增长变化之间的脱钩弹性的倒数计算的。使用了16个拉丁美洲国家1994年至2013年五年期的数据。值得注意的是，在所考虑的所有五个时间跨度中，拉丁美洲国家的技术效率程度低于技术效率程度，从而表明，总体效率低下的一部分原因是这些国家的生产低于生产边界，而不是技术使用效率低下。平均而言，结果证实，能源生产的技术规模变化是影响所分析国家样本中最佳生产前沿的主要因素。另外，根据脱钩分析的混合结果，我们可以得出结论，人均CO2排放量的增加/减少是由于其他经济和环境因素，而不是GDP增长率的负向积极影响。(C)2018爱思唯尔有限公司版权所有。
This study was developed according to a two-step approach. In the first step, we provide an investigation of the changes in eco-efficiency under constant and variable return to scale, while on a second step the evaluation of the decoupling elasticity will be given. The impacts of energy, economic and environmental determinants (inputs) on the performance indicators of eco-efficiency were calculated as the inverse of the carbon intensity (ratio of the GDP over the CO2 emissions, both from the World Development Indicators database), the changes in eco-efficiency and the decoupling elasticity between CO2 emissions, and economic growth changes. Data was used for 16 Latin America countries, according to five-year periods, from 1994 to 2013. For all the five-time span considered, it is worth noting, that the degree of technical efficiency for the Latin America countries is lower than the degree of technological efficiency, thus indicating that a portion of the overall inefficiency is due to the fact that these countries are producing below the production frontier rather than to an inefficient use of technology. On average, the results have confirmed that the technological scale change in energy production is the dominant factor influencing the optimal production frontier in the sample of countries under analysis. Complementarily, according to the mixed results from the decoupling analysis, we may conclude that the increase/decrease of the CO2 per capita emissions was due to other economic and environmental factors rather than to a negative positive effect of the GDP growth rate. (C) 2018 Elsevier Ltd. All rights reserved.