2009年API管材类标准信息

API RP 5A3/ISO 13678套管、油管和管线管用螺纹脂推荐作法Recommended Practice on Thread Compounds for Casing, Tubing, and Line Pipe石油天然气工业——套管、油管和管线管用螺纹脂的评价与试验     

Capital liquidity and residents’ consumption decision: An asymmetry analysis of economic prosperity

Among the current literatures that discuss the influence exerted on residents’ consumption behavior by capital liquidity, some often independently decide the demarcation point of the liquidity restriction that affects residents’ consumption behavior, without taking into account when the economy is flourishing whether residents will be influenced by the restriction of the liquidity that their consumption behaviors can not be fully carried out. We introduce a threshold model which varies according to the actual GDP and other financial indicators (money supply, average stock index and balance of bank loans) to discuss residents’ consumption behavior in China under different economic states. The empirical results show that when the economy flourishes or resuscitates, residents’ income of the same period have not notable influence on their consumption, which suggests that residents’ consumption behavior does not considerably change according to the fluctuation of the current income, but conforms with the constant income-life cycle hypothesis. Moreover, two estimated values 0.7504 and 0.8597, as economic boom measures, all fall in the boom stable stage—basically consists with the early-warning index of the macro-economy boom issued by National Bureau of Statistics of China. It shows that the macro-economic boom is not notablely influenced by capital liquidity, so is residents’ consumption behavior.     

金融发展中的制度因素:理论框架与国际经验

本文在现有文献的基础上,提出了"制度与金融发展"这一新的理论命题,并利用跨国截面数据系统地检验了该理论.从国际经验来看,产权结构、法律制度和金融利益集团力量都对金融发展有显著的影响.本文的结论是:只有进一步完善产权、法律以及信用等制度才能推动中国金融进一步发展.     

THE INCOME REDISTRIBUTION EFFECT OF CHINA'S PERSONAL INCOME TAX: WHAT THE MICRO‐DATA SAY

This article uses continuous micro‐level data to investigate the income redistribution effect of the personal income tax (PIT) in China beginning in 1997. We find that the average tax rate plays a larger role in determining the income redistribution effect of PIT than tax progressivity does. Although tax progressivity decreased as a result of rising personal incomes and a constant PIT policy prior to 2005, the income redistribution effect of the PIT improved as a result of the higher average tax rate. The tax reform beginning in 2006 increased tax progressivity while decreasing the average tax rate, thereby weakening the income redistribution effect of the PIT. Further analysis indicates that the middle‐income group was the only net loser before 2005, but it benefited from the PIT policy reform. A cross‐country comparison shows that China has a lower PIT burden and higher progressivity than developed countries; in fact, China's levels of progressivity and tax burden are similar to those of Latin American countries. (JEL H24, D31, H31)     

融资结构、融资治理与企业价值——基于零售业上市公司的实证研究

我国零售企业由于行业的特殊性,融资结构不同于我国资本市场中的其他企业,其融资治理对企业价值的影响也不同。本文选取2004—2007年的数据就零售业上市公司融资治理对企业价值的影响进行实证分析,结果表明零售企业的债权融资并没有发挥其应有的治理作用;股权集中以及管理者持股对企业价值具有显著的正向影响;股权分置改革对零售企业融资结构及融资治理效应产生了显著影响。     

白城市雨洪资源利用经济社会效益研究

在建立雨洪资源利用经济社会效益指标体系的基础上,以白城市为例,识别和构建其雨洪资源利用经济社会效益体系;利用可变模糊识别模型对其进行效益评估,分析比较白城市雨洪资源利用年前后经济社会发展趋势,为今后雨洪利用和发展提供借鉴。     

人机系统可靠性的相关性研究

人机系统各子系统之间存在着相互依赖关系。计算人机系统可靠性时,必须考虑而又非常困难的问题就是各个系统之间失效相关性的问题,相关性影响了对人机系统可靠性的正确评估。文中分析了系统之间的相关性问题,探讨了相关性对人机系统可靠性的制约程度,以期从人机系统的可靠性角度为人机系统的优化设计提供新的依据。     

服务业外商直接投资与经济增长关系的实证分析——以江苏省为视角

在述评相关领域已有成果的基础上,以江苏省1992年到2007年的数据为样本,运用时间序列分析和滞后变量模型对服务业外商直接投资和江苏省经济增长的关系进行了实证研究。结果表明:江苏省GDP和SFDI均为非稳定的时间序列数据,但两者之间存在协整关系和正相关关系。     

国外计划报废理论研究综述

国外学者对计划报废理论早已开展了许多富有成效的研究;然而,在国内至今罕有相关方面的文献研究。因此,开展相关研究具有非常重要的理论和现实意义。首先,以iPod为例,引出了计划报废的概念和模型。然后分别从网络外部性与兼容性决策、耐用性决策、新产品引进、技术进步和研发决策等五个方面,对有关研究进行了综述。     

对提高电磁除铁器除铁效果的研究

根据影响电磁除铁器吸力的相关因素,采用普通方法来提高电磁吸力所存在的瓶颈。采用短时强励法来提高除铁效果,解决电磁吸力存在的瓶颈。