Ali Wajahat, Abdullah Azrai, Azam Muhammad
Department of Management and Humanities, Universiti Teknologi PETRONAS, Tronoh, Perak, Malaysia.
School of Economics, Finance & Banking, College of Business, Universiti Utara Malaysia, Sintok, Malaysia.
Environ Sci Pollut Res Int. 2017 May;24(14):12723-12739. doi: 10.1007/s11356-017-8888-6. Epub 2017 Apr 5.
The current study investigates the dynamic relationship between structural changes, real GDP per capita, energy consumption, trade openness, population density, and carbon dioxide (CO) emissions within the EKC framework over a period 1971-2013. The study used the autoregressive distributed lagged (ARDL) approach to investigate the long-run relationship between the selected variables. The study also employed the dynamic ordinary least squared (DOLS) technique to obtain the robust long-run estimates. Moreover, the causal relationship between the variables is explored using the VECM Granger causality test. Empirical results reveal a negative relationship between structural change and CO emissions in the long run. The results indicate a positive relationship between energy consumption, trade openness, and CO emissions. The study applied the turning point formula of Itkonen (2012) rather than the conventional formula of the turning point. The empirical estimates of the study do not support the presence of the EKC relationship between income and CO emissions. The Granger causality test indicates the presence of long-run bidirectional causality between energy consumption, structural change, and CO emissions in the long run. Economic growth, openness to trade, and population density unidirectionally cause CO emissions. These results suggest that the government should focus more on information-based services rather than energy-intensive manufacturing activities. The feedback relationship between energy consumption and CO emissions suggests that there is an ominous need to refurbish the energy-related policy reforms to ensure the installations of some energy-efficient modern technologies.
本研究考察了1971 - 2013年期间,在环境库兹涅茨曲线(EKC)框架下,结构变化、人均实际国内生产总值、能源消耗、贸易开放度、人口密度与二氧化碳(CO)排放之间的动态关系。该研究采用自回归分布滞后(ARDL)方法来考察所选变量之间的长期关系。研究还采用动态普通最小二乘法(DOLS)技术来获得稳健的长期估计值。此外,使用向量误差修正模型(VECM)格兰杰因果检验来探究变量之间的因果关系。实证结果表明,从长期来看,结构变化与CO排放之间呈负相关关系。结果显示,能源消耗、贸易开放度与CO排放之间呈正相关关系。该研究应用了伊特科宁(2012)的转折点公式,而非传统的转折点公式。该研究的实证估计结果不支持收入与CO排放之间存在环境库兹涅茨曲线关系。格兰杰因果检验表明,从长期来看,能源消耗、结构变化与CO排放之间存在长期双向因果关系。经济增长、贸易开放度和人口密度单向导致CO排放。这些结果表明,政府应更多地关注信息服务,而非能源密集型制造活动。能源消耗与CO排放之间的反馈关系表明,迫切需要重新审视与能源相关的政策改革,以确保安装一些节能现代技术。