上海市总部集群建设与区域创新发展

上海依托其金融、贸易、航运的中心地位,吸引大量的跨国公司总部进驻。近10来年,上海的总部经济规模迅速扩大,形成几个特大规模的总部经济集聚区,但其总部经济的发展也存在较大的问题,总部集群的要素集聚度低,总部集群的创新水平低,总部集群创新环境较差等问题。建设好上海的总部经济有其重要的现实意义,我们应大力提高总部经济的自主创新能力、促进创新环境的建设、构建创新要素的网络结构等。     

股权性质、环境不确定性与技术资本配置效率

技术转化为资本，资本创造价值已经成为共识，技术资本在不同公司创造价值的作用程度不同，根源是技术资本配置效率问题。选取沪深两市2008-2013年间制造业上市公司为样本，检验了基于不同股权性质的公司环境不确定性对企业技术资本配置效率和价值的影响，研究结果表明：①企业环境不确定性程度越高，技术资本配置效率越低，并且技术资本配置偏离度在国有公司中表现为配置过度，在非国有公司表现为配置不足；②在股权性质为国有的公司中，由环境不确定性引发的技术资本配置偏离将降低企业价值，在非国有控股公司中，由环境不确定性导致的技术资本配置偏离将增加企业价值。     

Understanding the impacts of ‘Grain for Green’ land management practice on land greening dynamics over the Loess Plateau of China

Land greening in China is regarded as contributing a great deal to greening of the Earth. The phenomenon is mainly attributed to climate change, arising atmospheric CO₂ and ‘Grain for Green’ (GFG) land management policies. However, limited knowledge is known how much land greening is from contributions of the GFG practice. Therefore, the study took the typical region of the GFG practice, the Loess Plateau, as the study area, and used 1982–2015 satellite-observed GIMMS3g normalized difference vegetation index (NDVI) data, ERA-Interim climatic variables (precipitation, temperature and solar radiation) and atmospheric CO₂ concentration data with the help of a developed TPRC-based NDVI model to derive GFG-induced NDVI after 1999. Furthermore, this study tracked the spatial-temporal dynamics of GFG-induced NDVI and assessed contributions of the GFG practice to regional vegetation changes. Results showed that satellite-observed NDVI and TPRC-based NDVI both exhibited an increasing spatial pattern from the northwestern to southeastern Loess Plateau, but their greening trends were separately 0.0022 and 0.0009 per year in 1982–2015 (p < 0.05). Note that the satellite-observed greening trend was much steeper with a slope of 0.0056 per year after 2006 (p < 0.05). The subsequent analyses documented that GFG-induced land greening were largely responsible for the steep trend. In space, evident greening patterns began to be observed in the central Loess Plateau from 2006 to 2008, afterwards expanded towards eastern and southwestern Loess Plateau. In 2011–2015, the increase magnitude of GFG-induced land greening in the Loess Plateau averagely accounted for 8.5 % in comparison to estimated TPRC-based NDVI, but in six natural zones were various, ranging from 3.2%–15.7%. In some regions of central Loess Plateau, GFG-induced NDVI contributed even more than 20 % to vegetation increase. This study highlights that land use management contributes more to land greening dynamics over the Loess Plateau compared to climate change and arising atmospheric CO₂ concentration. These findings likely provide some valuable information for curbing or enhancing specific-location vegetation changes in future regional land management and planning.     

供应商集中、公司治理与企业价值 ——基于我国A股制造业上市公司数据

本文通过选取2010—2017年我国A股制造业上市公司的数据,先研究公司供应商集中对于公司价值的直接影响,结论显示公司供应商集中对于企业价值有着负面的影响;然后在进一步研究中,探究了公司治理相关因素以及面临的融资约束情况对于公司供应商集中与公司价值关系的调节作用。实证结果显示,产权性质以及董事会独立性会对两者的关系产生影响;股东间的相互关联以及对于高管薪酬激励都对公司供应商集中与公司价值的关系有着负向的调节作用。与此同时公司面临的融资约束越小,公司供应商集中对于公司价值的负面效应越弱;最后利用多重中介效应模型探究了供应商集中的作用机制。     

The challenge of legitimizing spatially differentiated regulation: Experiences from the implementation of the Danish Buffer zone act

Differentiating regulation is a promising approach to agri-environmental regulation that may potentially reduce the environmental impact of agriculture at the lowest possible costs for the farmers and society, but also possesses a number of challenges. In this article, we explore the challenges to the legitimacy of agri-environmental regulation that occurs when the regulatory regime changes from general regulation to differentiated regulation. The analysis is based on a case study of the implementation of the Buffer zone act in Denmark – a regulation that prevents agricultural production in a 10 (later 9) meter fringe around selected waterbodies. We distinguish between two different ways of legitimizing: Producing knowledge and participation. We conclude that to harvest some of the obvious benefits of differentiated regulation a number of challenges must be resolved, 1) ensuring legitimacy of differentiated regulation is crucial, 2) differentiated regulation imply that farmers are also differentiated, 3) differentiated regulation implies new uncertainties, 4) the current knowledge regime need to be reconfigured, 5) stakeholders feel that they are unevenly treated and 6) it is difficult to establish a win–win solution for all farmers on an individual level.     

东北鼠兔小兴安岭亚种的分布和生境

本文通过访问调查和实地调查等方式,对东北鼠兔小兴安岭亚种的分布状况和生境特征进行调查和分析,结果表明:东北鼠兔小兴安岭亚种以点状分布的形式广泛分布于小兴安岭各林区,重点分布区包括五大连池火山岩区和伊春林管局辖区南部和北部;东北鼠兔小兴安岭亚种对生境需求较为特殊,包括生境的基质需要具有较好的孔隙结构,周围需要有草本层等植被条件,基质无浸水,基质需要具有一定的面积,不选择或很少选择蒙古栎林生境。     

胶原蛋白在食品中的应用现状及其发展前景分析

由于具有独特的生物功能和理化性质,胶原蛋白拥有着较强的保健功能和较高的营养价值。所以近年来,越来越多的学者开始研究胶原蛋白的保健功能,并且对食品中应用的胶原蛋白的制备问题展开了研究。     

退休老年人身体形态与力量素质相关关系的研究

近年来老年人的身体健康现状日益成为人们关注的焦点问题之一,为了对退休老年人的身体健康状况有进一步的了解,对58-68年龄段退休老年人进行身体形态和力量素质的测试。研究发现身高与握力（r=0.659）、体重和握力（r=0.655）均有显著相关性,且呈正相关趋势,身高与体重（r=-0.243）呈负相关。因此在适度原则下,应加强以力量素质为主的体育锻炼,其对于提高身体素质,增进健康有非常重要的意义。     

The source of global stock market risk: A viewpoint of economic policy uncertainty

This study explores the effect of economic policy uncertainty (EPU) in four countries or regions (China, Japan, Europe, and the United States) on the contagion risk of investments in the global stock market. The stock returns of 22 stock markets worldwide are analyzed to determine which region’s EPU exhibits the greatest effect on regional systematic risk in the global stock market and on volatility risk in individual stock markets. First, all of the samples, the markets of different continents and the spillover indices of the developed and emerging markets, are calculated to observe the dynamic correlation among these markets with the aim of quantifying regional systematic risk and further examining the contagion risk effect of EPU. The results indicate the following: EPU in China is the most influential, and its contagion risk spreads to different regional markets, except for Europe; the effect of EPU in the United States is inferior to that in China; EPU in Japan merely influences contagion risk in emerging markets; contagion risk in European markets is not influenced by the four EPU indices; and EPU in Europe is not influenced by contagion risk in the global stock market. However, according to the volatility risk in each market, the EPU in Europe and China respectively influence Asian countries and European countries the most. These results may be attributable to the extremely high trade dependence among these countries because the performance of international enterprises is mainly determined by the economic policies of their trading partners.     

研学结合教学理念在微观经济学课程中的应用

为了探索适合高职学生学习特点的教学方法，提高教学质量，本文就研学结合教学理念的内涵、实施路径、特征和目的进行了探索和研究，并在微观经济学课程中进行试验。结果显示教学效果良好，教学质量得到提升，学生的学习兴趣得以提高，主动参与的积极性增加，培养了学生分析问题和解决问题的能力，为专业训练和实践打好基础。论文最后就研学结合教学理念在微观经济学课程实施中存在的问题进行了剖析，并提出了进一步探索和努力地方向。