The impact of the petroleum sector on the output of the Nigerian construction sector

The petroleum sector plays an important role in the Nigerian economy, as it is the single largest revenue earner of the country and one of the largest contributors to the gross domestic product (GDP). This study estimated the impact of petroleum and gas revenue on the performance of the construction sector using a polynomial distributed lag model. We extracted data on the petroleum and gas sector (PGS), the GDP and construction sector output (CNS) for this study from the Central Bank of Nigeria (CBN) Statistical Bulletin. The analysis employed econometric methodology, which includes testing for stationarity and co‐integration as well as estimating the distributed lag model. The result shows that the petroleum and gas revenue significantly affected construction output for three consecutive years starting from their year of occurrence. The study concluded that the PGS has a far‐reaching impact on the growth and development of the construction sector. It therefore recommends supporting the channelling of funds from the petroleum sector into development of constructed facilities infrastructure.     

我国城市住宅建设投资比例与投资需求量预测

本文通过把灰色系统和计量经济学方法结合起来,建立了我国城市住宅建设投资需求量模型,对城市住宅建设投资比例进行了系统地分析。预测了到本世纪末城市住宅建设投资需求量。     

Environmental Engel curves in Italy: A spatial econometric investigation

This paper adopts a spatial econometric methodology to investigate the relationship between income and direct household emissions in Italy, as posited by the environmental Engel curve. The spatial approach is motivated by an expanding strand of studies that have detected significant spatial interactions in household-polluting activities responsible for the generation of direct household emissions. Our results suggest the presence of significant spatial dependence for household emissions emerging among regions. At the same time, increases in the level of income do not seem to be coupled with a higher demand for environmental quality by Italian households.     

Measuring Agility and Architectural Integrity

Most organizations that depend on software are pursuing more flexible architectures and more agile life-cycle processes to increase business flexibility. What does agility look like, and how do we measure it? A truly agile project or organization should experience changes that are more straightforward and more predictable. Consequently, improvements are best measured by gauging the change trends in software baselines. A well-accepted tenet of software engineering states, "The later you are in the life cycle, the more expensive things are to fix." This iron law, an artifact of a waterfall culture, should not apply if you have transformed to agile software delivery with a well-architected system. This bold assertion is the root of the metric patterns presented in this paper.     

经济计量模型在经济政策分析中的作用

文章对如何利用宏观计量经济模型分析宏观经济政策效果及政策作用机制进行了理论分析。对外生性及脉冲反应概念及其相互关系给出了较详尽解析,分析了外生性及脉冲反应在政策分析中的传导作用。     

基于计量经济的供电企业培训投入产出评估研究

针对供电企业培训投入产出分析困难、无法准确衡量等问题,在分析目前国内外主流培训项目评估理论和实践的基础上,针对供电企业教育培训工作特点及企业性质,研究培训项目对企业绩效价值传导关系的分析方法,基于计量经济学原理构建了培训投入产出评估模型。以某供电企业近年数据进行了实证研究,根据研究结果给出了完善培训项目设计、优化培训投入结构及改进培训管理等方面的改进措施,为企业培训投入产出评估提供了参考。     

Testing for Panel Cointegration Using Common Correlated Effects Estimators

Spurious regression analysis in panel data when the time series are cross section dependent is analysed in the article. We show that consistent estimation of the long‐run average parameter is possible once we control for cross section dependence using cross section averages in the spirit of the common correlated effects approach proposed by Pesaran. This result is used to design a panel cointegration test statistic accounting for cross section dependence. The performance of the proposal is investigated in comparison with factor‐based methods to control for cross section dependence when strong, semi‐weak and weak cross section dependence may be present.     

河北省高校体育教师工作满意度的性别差异

以河北省高校体育教师为研究对象,使用最新采集调查数据,采用微观计量分析方法,对影响教师工作满意度的7个凶素建立计量模型,考察体育教师工作满意度的性别差异。基础回归显示女性体育教师工作满意度比男性教师高出15．4％,在1％水平上显著,在逐一控制家庭背景相关变量后,该数值下降到10．8％,在5％水平上显著。男性体育教师具有更良好的家庭背景并不能帮助他们缩小这种差距。进一步研究发现,造成工作满意度性别差距的主要原因是男女体育教师具有不同的人力资本。研究结果表明,造成男女体育教师具有不同工作满意度的原因不是性别差异,而是具有不同的家庭背景和人力资本。