We use the general form of hat matrix and DFBETA measures to detect the influential observations in order to estimate the Divisia price index number when the error structure is first order serial correlation. An examp...We use the general form of hat matrix and DFBETA measures to detect the influential observations in order to estimate the Divisia price index number when the error structure is first order serial correlation. An example is presented with reference to price data of Pakistan. Hat values show the noteworthy findings that the corresponding weights of consumer items have large influence on the parameter estimates and are not affected by the parameter of autoregressive process AR(1). Whereas DFBETAs for Divisia index numbers depend on both the weights and autoregressive parameter.展开更多
物流业是能源消耗和碳排放的主要产业,碳达峰、碳中和目标的提出将对物流业发展产生深远的影响,因此行业低碳化发展成为亟须解决的问题。运用碳排放系数法测度福建省2012—2021年物流业碳排放总规模,在此基础上利用对数平均迪式指数分解...物流业是能源消耗和碳排放的主要产业,碳达峰、碳中和目标的提出将对物流业发展产生深远的影响,因此行业低碳化发展成为亟须解决的问题。运用碳排放系数法测度福建省2012—2021年物流业碳排放总规模,在此基础上利用对数平均迪式指数分解法(logarithmic mean Divisia index,LMDI)模型分析能源结构、能源效率、产业结构、经济增长和人口因素对福建省物流业运行效率的影响。研究结果显示:经济增长、能源效率和人口因素对福建省物流业碳排放总量增加起促进作用,其中经济增长因素的促进作用最大;能源结构和产业结构因素对福建省物流业碳排放增加起抑制作用。最后,基于实证分析结果,提出推动福建省物流业低碳化发展建议。展开更多
The existing oil import dependence index cannot exactly measure the economic cost or scales, and it is difficult to describe the economical aspect of oil security. To measure the foreign dependence of one country'...The existing oil import dependence index cannot exactly measure the economic cost or scales, and it is difficult to describe the economical aspect of oil security. To measure the foreign dependence of one country's economy and reflect its oil economic security, this paper defines the net oil import intensity as the ratio of net oil import cost to GDP. By using Divisia Index Decomposition, the change of net oil import intensity in five industrialized countries and five newly industrialized countries during 1971—2010 is decomposed into five factors: oil price, oil intensity, oil self-sufficiency, domestic price level and exchange rate. The result shows that the dominating factors are oil price and oil intensity; moreover, the newly industrialized countries have higher net oil import intensity than industrialized countries.展开更多
“十四五”时期是中国实现碳达峰的关键时期,也是推动经济高质量发展和生态环境质量持续改善的重要阶段。可拓展的随机性环境影响评估(Stochastic Impacts by Regression on Population,Affluence,and Technology,STIRPAT)模型可以根据...“十四五”时期是中国实现碳达峰的关键时期,也是推动经济高质量发展和生态环境质量持续改善的重要阶段。可拓展的随机性环境影响评估(Stochastic Impacts by Regression on Population,Affluence,and Technology,STIRPAT)模型可以根据研究需要增加自变量,更好地分析相关因素对因变量的影响。以北京市为研究区,通过构建扩展的STIRPAT模型,分析人均地区生产总值(Gross Domestic Product,GDP)、人均汽车保有量、城市化率、第三产业GDP占比、能源消费强度与人均碳排放量的关系,并采用对数平均迪氏指数(Logarithmic Mean Divisia Index,LMDI)分解法分解能源消费强度。结果表明,产业结构和能源消费强度对人均碳排放量均有显著的正向影响。总体来看,要平衡经济发展与碳排放的关系,提高能源利用效率,推广可再生能源,降低能源消耗,减少碳排放。展开更多
文摘We use the general form of hat matrix and DFBETA measures to detect the influential observations in order to estimate the Divisia price index number when the error structure is first order serial correlation. An example is presented with reference to price data of Pakistan. Hat values show the noteworthy findings that the corresponding weights of consumer items have large influence on the parameter estimates and are not affected by the parameter of autoregressive process AR(1). Whereas DFBETAs for Divisia index numbers depend on both the weights and autoregressive parameter.
文摘物流业是能源消耗和碳排放的主要产业,碳达峰、碳中和目标的提出将对物流业发展产生深远的影响,因此行业低碳化发展成为亟须解决的问题。运用碳排放系数法测度福建省2012—2021年物流业碳排放总规模,在此基础上利用对数平均迪式指数分解法(logarithmic mean Divisia index,LMDI)模型分析能源结构、能源效率、产业结构、经济增长和人口因素对福建省物流业运行效率的影响。研究结果显示:经济增长、能源效率和人口因素对福建省物流业碳排放总量增加起促进作用,其中经济增长因素的促进作用最大;能源结构和产业结构因素对福建省物流业碳排放增加起抑制作用。最后,基于实证分析结果,提出推动福建省物流业低碳化发展建议。
基金Supported by the National Natural Science Foundation of China(No.71273027 and No.71322306)
文摘The existing oil import dependence index cannot exactly measure the economic cost or scales, and it is difficult to describe the economical aspect of oil security. To measure the foreign dependence of one country's economy and reflect its oil economic security, this paper defines the net oil import intensity as the ratio of net oil import cost to GDP. By using Divisia Index Decomposition, the change of net oil import intensity in five industrialized countries and five newly industrialized countries during 1971—2010 is decomposed into five factors: oil price, oil intensity, oil self-sufficiency, domestic price level and exchange rate. The result shows that the dominating factors are oil price and oil intensity; moreover, the newly industrialized countries have higher net oil import intensity than industrialized countries.
文摘“十四五”时期是中国实现碳达峰的关键时期,也是推动经济高质量发展和生态环境质量持续改善的重要阶段。可拓展的随机性环境影响评估(Stochastic Impacts by Regression on Population,Affluence,and Technology,STIRPAT)模型可以根据研究需要增加自变量,更好地分析相关因素对因变量的影响。以北京市为研究区,通过构建扩展的STIRPAT模型,分析人均地区生产总值(Gross Domestic Product,GDP)、人均汽车保有量、城市化率、第三产业GDP占比、能源消费强度与人均碳排放量的关系,并采用对数平均迪氏指数(Logarithmic Mean Divisia Index,LMDI)分解法分解能源消费强度。结果表明,产业结构和能源消费强度对人均碳排放量均有显著的正向影响。总体来看,要平衡经济发展与碳排放的关系,提高能源利用效率,推广可再生能源,降低能源消耗,减少碳排放。
