我国不同区域房地产财富效应差异     

张乐 《宜宾师范高等专科学校学报》2014,(5):46-51

根据经济发展基本面及房地产市场的发展水平,将我国大中城市划分为一线、二线及三线市场,利用2001—2010年间的相关数据,采用Panel Data模型分析了不同类型城市的房地产的财富效应。结果表明,从全国范围来看,房地产存在一定的正向财富效应。但一、二线城市,房地产财富效应显著为负,二线城市更为突出,三线城市显著为正。  相似文献   

中国大中城市房价与工资变动关系的计量研究     

王芸 《襄樊学院学报》2014,35(9):44-48

为了研究房价与工资的变动关系,选取中国35个大中城市并分成北部、中南、东部、西部四个区域,建立不同区域的面板数据模型,通过单位根检验、协整检验、建立动态面板固定效应变截距模型.研究表明房价增长速度与工资增长速度存在着正向的增长关系,工资增长速度高于房价增长速度.建议政府在制定收入政策和住房调控政策时,应结合不同区域的情况,制定合适的住房调控政策;提高居民收入水平,缩小不同地区之间的工资差距.  相似文献   

中国城镇化水平与GDP的门槛效应关系     

林立达 《襄樊学院学报》2014,35(10):34-38

通过构建城镇化水平、GDP、外商直接投资和金融发展的指标体系,利用我国2000—2012年的省际面板数据构建面板门限模型。实证结果表明,城镇化对GDP增长的促进作用,中部地区和西部地区都高于全国水平,而东部地区低于全国水平;外商直接投资对于GDP增长的促进作用。西部地区最大,东部和中部地区作用较小;金融发展水平对于GDP增长的促进作用,东部地区要高于全国水平,但中部和西部地区不显著;城镇化与GDP关系对于外商直接投资和金融发展水平的门槛效应,大致呈现倒“U”型。  相似文献   

The influence of dovetailed cross beams on the dimensional stability of a panel painting from the Middle Ages     

Ottaviano Allegretti  Marco Fioravanti  Paolo Dionisi-Vici  Luca Uzielli 《文物保护研究》2014,59(4):233-240

This paper describes experiments carried out to determine the influence of dovetailed cross beams on the dimensional stability of a panel painting from the Middle Ages. Besides a serious cup (transverse distortion), the panel featured an unusual longitudinal distortion, a bow, mostly originating from bending in the proximity of the middle cross beam. Because of its localized occurrence, bending appeared to be caused by the crossbeam somehow pushing on the walls of its channel. Thanks to the cooperation offered by the curator and the restorer, some non-damaging tests were performed to measure the distortions of the panel, with and without the cross beams, after conditioning it in different climates. Processing and analysis of the measurement results demonstrated that the bow of the panel increases as the wood moisture content decreases. This led to the conclusion that the bow is actually produced by forces exerted by the cross beam along the panel's length, according to a mechanism named thrust transformation. By this mechanism the cross beam partly transforms the panel's tendency towards cupping, into a bow distortion.  相似文献   

中观层面上技术标准的溢出效应分析:基于省际面板数据     

王丽君  陈韬  王益谊 《科技管理研究》2021,41(4):175-182

采用2001—2017年我国30个省(区、市)的面板数据,基于标准体系构建代表地区知识扩散和吸收能力的标准化水平评价指数,并将其纳入改进的知识生产函数,分析包括标准化在内的各要素对创新产出的影响。研究结果表明:与传统的产出形式(如地区生产总值)相比,创新产出更加依赖于知识存量,同时受到区域知识扩散和吸收能力的影响;知识存量和区域标准化水平对创新产出存在溢出效应,规模报酬递减;在创新知识产出过程中,研发资本、研发人员、知识存量、标准化水平的影响具有显著的区域差异性。最后建议我国各地区基于不同的投入要素结构制定不同的创新激励政策,提高研发资本和研发人员对创新产出的贡献、知识存量对创新产出的规模报酬、区域对创新产出的消化和吸收能力以及标准化水平对创新产出的规模报酬。  相似文献   

Relationship between educational indicators and research outcomes in a panel of top twenty nations: Windows of opportunity     

《Journal of Informetrics》2014,8(2):349-361

The objective of the study is to examine the empirical relationship between educational indicators and research outcomes in top twenty nations of the World in terms of number of publications, citations and patents. The literature on higher education is useful in expressing the general and visible characteristics of a research domain, but cannot reveal the possible interaction between educational reforms and research outcomes. In order to overcome this limitation, the current study employed a panel cointegration technique to evaluate the long-run relationship between educational indicators and research productivity over a period of 1980–2011. The results reveal that educational indicators act as an important driver to increase research productivity in the panel of selected countries. The most promising educational factors i.e., higher education enrolment increases GDP and number of publications by 0.898% and 1.425%, respectively. Similarly, higher education expenditures per student increases research and development (R&D) expenditures, number of citations and number of patents by 1.128%, 0.968% and 0.714%, respectively. Finally, increasing school-life expectancy contributed to researchers in R&D by 0.401%. The study concludes that there is a window of opportunity to equip the youth with necessary skills to ensure a sustainable future for the nations. Higher education empowers and enables students to compete in a highly competitive and interconnected world through research and innovations, which are the drivers of new ideas, businesses and economic growth.  相似文献   

工业技术与资源环境协调发展的实证研究——基于超效率DEA生态效率和省际面板数据     

王瑾 《科技管理研究》2014,(21)

技术环境悖论认为技术同时是环境变化的起源和补救方式,中国工业加速发展不仅带来了技术进步和工业繁荣,也导致了一系列生态问题。本文在测算2007-2011中国各地区超效率生态效率的基础上,利用省际面板数据分析工业技术对生态效率的影响。结果表明：(1)中国的生态效率自东向西逐渐降低,资源环境要素生产率增长主要来源于技术进步;(2)虽然整体上工业自主创新和创新成果转化仍未摆脱粗放特征,但东南沿海地区自主创新对生态效率已呈显著正效应;(3)整体上高技术行业对生态效率的正效应显著,但中西部地区仍应加快完善高技术行业以促进生态正效应显现。  相似文献   

大温差下真空绝热板复合围护结构热工性能数值分析     

阚安康  康利云  水超  安骥  王峰 《上海海事大学学报》2014,35(2):68-73

为研究真空绝热板复合围护结构热工性能,采用真空绝热板对活动房墙体进行内保温、夹心保温和外保温形式的构造,根据寒冷地区气候变化特征建立物理及数学模型.对这3种构造大温差下的热工性能进行数值对比分析.在同一温度波连续作用下,理论分析3种构造活动房围护结构的衰减系数、延迟时间、围护结构内表面温度变化、热传递等.结果表明,内保温形式有利于减小热桥处的热流损失、减小辐射冷感、缩小内墙壁表面温度与室温的差距、改善室内热舒适性.该研究对真空绝热板在建筑领域的推广应用具有借鉴意义.  相似文献   

某型控制板耐久振动响应应力计算     

杨建新  杨明绪 《中国科技信息》2010,(4):47-48

针对某型控制板的振动耐久例行试验中出现的连接螺钉脱落和断裂现象,仿真计算正常和松动两种状态的螺钉响应应力,比较分析确定螺钉折断的原因为螺钉松动,并提出了相应的规程要求。  相似文献   

Learning dynamics in research alliances: A panel data analysis     

Tomaso Duso  Enrico Pennings  Jo Seldeslachts 《Research Policy》2010,39(6):776-789

The aim of this paper is to empirically test the determinants of Research Joint Ventures’ (RJVs) group dynamics. We develop a model based on learning and transaction cost theories, which represent the benefits and costs of RJV participation, respectively. According to our framework, firms at each period in time weigh the benefits against the costs of being an RJV member. RJV dynamics can then be interpreted as a consequence of this evolving trade-off over time. We look at entry, turbulence and exit in RJVs that have been set up under the US National Cooperative Research Act, which allows for certain antitrust exemptions in order to stimulate firms to co-operate in R&D. Accounting for unobserved project characteristics and controlling for inter-RJV interactions and industry effects, the Tobit panel regressions show the importance of group and time features for an RJVs evolution. We further identify an average RJVs long-term equilibrium size and assess its determining factors. Ours is a first attempt to produce robust stylized facts about co-operational short- and long-term dynamics, a neglected dimension in research co-operations, but an important element in understanding how collaborative learning works.  相似文献