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本文运用最小生成树方法研究2006-2013年由全球56个股票市场指数组成的网络。研究发现,这些股票市场在网络中存在明显的地理聚集效应,而且标普500指数、香港恒生指数、荷兰AEX指数、法国CAC40指数、新加坡海峡时报指数、墨西哥IPC指数是网络中的关键节点;在金融危机中,网络的聚集效应在小范围内有所加强。本文还采用滑动窗口技术研究指数间平均系数和最短距离的均值,动态分析全球股票市场网络的稳定性。结果表明,监管者可以重点监测核心节点,以保证网络的整体稳定性。  相似文献
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随着企业的不断成长和壮大,企业所有者的精力和能力逐渐无法独自驾驭庞大的企业组织,引进和建立经理人制度成为大势所趋。经理人的发展状况不仅成为企业未来发展的关键,也成为研究中国情境下的企业的学者们关注的重点。在中国知网(CNKI)1986~2013年的数据库中,搜索以"经理人"为"篇名"的所有论文的关键词作为基础数据源,基于复杂网络理论,构建经理人关键词的分析网络,借助UCINET6.0软件,利用密度、最短路径、派系、中心性等指标对所构建的"经理人关键词网络"的整体结构、节点进行分析。研究发现,经理人研究领域围绕经理人和职业经理人两个核心点展开,经理人角色定位、职业经理人市场等为研究的热点,对期权激励以及业绩的研究成为未来研究的趋势。  相似文献
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This article aims to disclose the exact relationship between government intervention and the evolution of industrial cluster innovation network in developing countries. Therefore, this article examines the role of government intervention in the evolution of the network from the perspective of network structure. After reviewing the structure of the innovation network, the author set up an evolution model of industrial cluster innovation network based on weighted scale-free network. Through computer simulations, it is learned that government intervention has a great impact on the evolution of industrial cluster innovation network. In the network formation stage, the impact of government intervention on the average shortest path exhibits as a U-shaped trend. In this stage, the government should intervene moderately to keep a short distance and close contact between the subjects. In the network stabilization stage, the effect of government intervention on the average shortest path is in the shape of an inverted U. In this case, the government should reduce the intervention, encourage enterprise innovation, and reduce the innovation risk of the whole network. The findings provide valuable reference for research in relevant fields.  相似文献
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This paper constructs a duplex banking network formed by credit relationships and information interaction via the banks’ balance sheet to model the structure of systemic risk and investigate the dynamic mechanism of contagion in terms of default and liquidity infection along with the factors that affect the extent of the contagion. We systematically explain the role that duplex banking networks play in different aspects of risk contagion. Through theoretical analysis and simulations, we conclude that asymmetric information interaction would increase the inflexibility of the system, which leads to liquidity shortage and possibly the collapse of the whole market. The weakness of systemic risk in the interior of the complex banking system can be characterized by the partial discount factor using illiquid assets in the information network. By improving the connectedness of the information network of the duplex networks, the spread of contagion can be partially slowed.  相似文献
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运用复杂网络方法,建立无向无权网络,考量新能源板块内88支股票间的联动性,结果表明,新能源股票间的收益具有联动性;一些股票在网络中占据重要位置,对于信息在新能源股票网络中传递起重要作用;所构建的网络具有小世界效应和无标度特性,但是幂律指数与大多数现实网络的幂律指数存在差异。鉴此,投资新能源股票,应综合考量市场波动对未来收益的影响,以更好规避投资风险。  相似文献
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