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排序方式: 共有355条查询结果,搜索用时 15 毫秒
1.
从效率差异视角构建国家创新影响力评价方法,揭示“一带一路”沿线国家创新要素流动倾向性以促进交流合作。运用DEA模型测算各国创新效率,根据DEA原理识别国家间的认可关系,构建创新网络并用节点特征向量中心度表示各国创新影响力,分析创新影响力类型、创新网络特征及创新投入冗余率与产出不足率。结果发现,各国创新效率存在显著差距;各国分别处于创新网络中心、核心和边缘位置,国家创新影响力依次递减;按照创新要素相对强度,沿线国家可分为6种创新类型;最后,提出沿线国家间开展创新交流与合作的必要性和途径。 相似文献
2.
Anders Bengtsson 《Industrial Marketing Management》2005,34(7):706-713
During the last decade branding has developed to be one of the main focus areas in consumer marketing. In the industrial marketing area there has only been limited attention to this phenomenon. In this paper we focus on how co-branding can be used on industrial markets to increase value. Through an empirical study of professional purchasers' attitudes towards co-branding activities between two companies, we explore the potential of this strategy. 相似文献
3.
New market creation through transformation 总被引:1,自引:0,他引:1
Is new market creation a search and selectionprocess within the theoretical space of all possible markets? Or is it the outcome of a process of transformation of extant realities into new possibilities? In this article we consider new market creation as a process involving a new
network of stakeholders. The network is initiated through an effectual commitment that sets in motion two concurrent cycles of expanding resources and convergingconstraints that result in the new market. The dynamic model was induced from two empirical investigations, a cognitive science-based
investigation of entrepreneurial expertise, and a real time history of the RFID industry.
JEL Classification:
M13, M31, D4, D52, D71, D72, L1, L2, P42
We would like to thank the Batten Institute at the Darden Graduate School of Business Administration, University of Virginia,
for supporting this research. We would also like to thank the following on specific contributions to our thesis: Anil Menon
for his relentless insistence on more precise formulations of effectual reasoning; Jim March for his conversation and for
inspiring us to dig into Type I and Type II errors; Rob Wiltbank for firming up the section on opportunity costs; and Stuart
Read for helping us clarify our writing.
Correspondence to: S.D. Sarasvathy 相似文献
4.
操作风险涉及银行经营活动的所有领域、各个环节和所有人员,不同银行、不同业务、不同环节的操作风险特征都不相同。操作风险度量是对操作风险进行经济资本配置的基础,目前还没有普遍适用的操作风险度量方法,现有的一些主流模型没有充分考虑内部控制对操作风险的影响和操作风险的因果性特征。因此,操作风险度量模型应考虑到其特征,既要综合主观和客观两方面的因素,也要可以灵活地进行动态调整。考虑到我国商业银行操作风险管理的实际,在操作风险度量模型的选择上,可用内部控制评价结果调整的基本指标法和标准法作为自上而下的度量模型,用贝叶斯网络技术作为自下而上的度量模型。 相似文献
5.
老年人独居比例和孤独感的上升已经成为家庭现代化转型中的典型现象,现有对二者关系的研究忽视了社会网络的视角。基于2014年中国老年健康影响因素跟踪调查数据,利用潜在类别分析和logistic回归模型考察了社会网络在老年人独居和孤独感之间所发挥的作用。研究发现,老年人独居并不意味着会感到孤独,不同类型的社会网络加重或缓解了独居带来的孤独感上升。具体而言:第一,老年人社会网络可以分为多元-活跃型、社会-消极型、子女-消极型和单一-活跃型四种类型;资源禀赋丰富的老年人具有多元-活跃型社会网络的概率更大。第二,仅具有子女-消极型社会网络的老年人,单人独居才会显著提升他们的孤独感。第三,单人独居和夫妇独居老年人均会通过多元-活跃型的社会网络缓解自身孤独感。应通过积极的公共政策,从能力建设和社区环境营造两方面,推动老年人社会网络向多元-活跃型转变。 相似文献
6.
中国对东亚国家(地区)的贸易长期处于逆差状态,而同时对美国却保持高额顺差。本文通过实证分析认为,中国对东亚的贸易逆差及对美国的贸易顺差之间存在联动效应,并从雁行模式的东亚产业转移、东亚生产网络及美国需求三方面分析了该联动效应产生的原因。还探讨了差额联动的变化趋势:长期看,由于中国在三角贸易中的地位将有所改变,差额联动效应有望减弱;短期看,差额联动效应仍将存在。Abstract: China has always been keeping trade deficit with East Asia,but keeping trade sur-plus with America at the same time.The paper proves a coupling effect between the trade surplus and deficit by positive analysis,and analyses the reason why a coupling effect can exist from three aspects:East Asian industrial transfer in flying geese model,East Asian production net-works and American demand.The paper also discusses the trend of coupling effect:in the long run,the effect is expected to reduce since the position of China in triangular trade pattern will be changed;in the short term,the effect will still exist. 相似文献
7.
《International Journal of Forecasting》2020,36(3):1092-1113
Proactively monitoring and assessing the economic health of financial institutions has always been the cornerstone of supervisory authorities. In this work, we employ a series of modeling techniques to predict bank insolvencies on a sample of US-based financial institutions. Our empirical results indicate that the method of Random Forests (RF) has a superior out-of-sample and out-of-time predictive performance, with Neural Networks also performing almost equally well as RF in out-of-time samples. These conclusions are drawn not only by comparison with broadly used bank failure models, such as Logistic, but also by comparison with other advanced machine learning techniques. Furthermore, our results illustrate that in the CAMELS evaluation framework, metrics related to earnings and capital constitute the factors with higher marginal contribution to the prediction of bank failures. Finally, we assess the generalization of our model by providing a case study to a sample of major European banks. 相似文献
8.
Based on the significant amount of literature on the concept of spatial, ecological, and social embeddedness in the Alternative Food Networks (AFNs) research, this study describes the main dynamics related to the involvement of non-conventional farmers in their collective ideas and actions.With a comparison between two European regions: Sardinia and the Community of Madrid, the paper identifies different styles of behaviour among organic producers, whether or not supervised by a control body, and highlights the differences and similarities regarding their ideas about how alternative agriculture has an impact on the environment as well as society. Eco-economies and ecopreneurship are also considered. The aim is to see if, and to what extent, these ideas have a collective character, going beyond the limits of the single farm to reach a regional scale and, thus, if there is a basis for the development of future food-related planning policies. Through the information provided by semi-structured interviews, farmers have been divided into categories according to their degree of embeddedness, described through the main themes that emerged during the interviews. Every farmer has been included in only one category according to his or her main preference, which does not imply the ab-sence of a positive attitude towards other categories.The study aims to contribute to the understanding of how AFN values and methods can boost the improvement of biodiversity and landscape conservation through collective actions which have the power to boost and develop rural initiative at a regional scale. 相似文献
9.
This study develops a novel agent-based model of the interbank market with endogenous credit risk formation mechanisms. We allow banks to exchange funds through unsecured and secured transactions, which facilitates the flow of funds to the most profitable investment projects. Risk premiums result from banks׳ forecasting rules and depend on past performance of the benchmark risk factors and interest rates. Our model confirms basic stylized facts of the interbank interest rates and volumes. We also find that network structures within the secured market segment are characterized by the presence of dealer banks, while we do not observe similar patterns in the unsecured market. We perturb the model with exogenous shocks and policy scenarios which correspond to unconventional monetary policies. 相似文献
10.
客运专线铁路对测量精度要求较高,传统的分阶段布网方式和方法已不能满足现代高速铁路建设的需要。文章提出了"三网合一"的测量体系和布设原则及控制网的精度梯度等级,该体系的建立能统一高速铁路勘测控制网、施工控制网、运营维护控制网的起算基准和协调其精度,保证无碴轨道铁路工程的顺利实施。 相似文献