论现代绿色物流管理面对的问题与策略

随着经济的发展,环境恶化程度日益加深,现代物流活动作为经济活动的一部分,也同样面临环境问题,为保证社会实现协调可持续的发展,进行绿色物流管理成为今后物流关注的新焦点,明确了绿色物流的内涵和推行的必要性,并着重探讨了实施现代绿色物流管理的有效措施及途径.     

证券投资风险计量理论评述

证券投资是一种高风险高收益的金融投资。自Markowitz创立投资组合理论以来，对证券投资风险计量的研究一直是金融投资研究的热点问题之一。本文对现有计量理论进行评述，并对它们之间的关系进行分析，为证券投资风险计量的进一步研究提供基础。     

合作社与单个社员目标决策比较:一般理论分析

合作社独特的质的规定性使得社员成为所有者身份和惠顾者身份的同一,由此产生的合作社和单个社员目标决策的一致性成为分析合作社内部决策机制的逻辑起点。本文利用模型分别对合作社目标决策和单个社员目标决策进行分析,结果表明:合作社决策结果受社员的个人风险偏好、资产投资组合方式、内部治理机制及谈判力量对比的影响。这些因素阻碍了合作社中具有不同利益的群体通过自由谈判和补偿原则达成一致的可能性。     

中国出口贸易的技术结构及其变迁:1980-2003

本文旨在构建一套测度出口贸易技术结构的方法,并在SITC三位码分类水平下,从国际比较的角度,分析改革开放以来中国出口贸易的技术结构及其变迁。第一,本文建立了测度产品技术含量的一个指标,进而提出一套分析经济体出口贸易的技术结构的新方法;第二,利用本文提出的分析工具,通过国际比较,从多个方面分析了1980—2003年中国出口贸易的技术结构,结果表明:改革开放以来,中国出口贸易的整体水平得到了很大提高,但仅表现出微弱的向世界水平收敛的趋势;中国出口贸易的技术结构高度没有显著提高,但在不同时期表现出不同的趋势;中国出口贸易的技术结构分布发生了与众不同的重大变化。     

Endogenous Managerial Incentives and the Optimal Combination of Debt and Dividend Commitments

This paper studies the optimal combination of debt and dividend commitmentsin an agency model of the firm. Financial policy is relevant because ex-post information asymmetry requires managerial rewards to depend on the ability to meet financial commitments. If perquisite or inside information problems exist in isolation, debt-based incentives as assumed in previous studies result endogenously. If the problems exist simultaneously, dividends can be optimal even when they appear excessively costly as a signal and unduly lenient as a disciplining device. The reason is that the set of dynamically consistent rewards increases when debt commitments are augmented with dividend commitments, and a larger set of ex-post rewards is more valuable as ex-antedecisions become more complex.     

基于DEA-Tobit模型的特级资质建筑企业科技创新效率测度

建筑企业研发不足已成为我国企业科技进步与创新发展的一大障碍,面对激烈的国际市场竞争,各地区特级资质建筑企业的科技创新能力与科技进步水平如何是一个值得深入研究的问题。采用DEA-Tobit模型,分析了我国内地31个省（市、区）特级资质建筑企业的科技创新效率。研究结果表明,2011-2013年我国特级资质建筑企业整体发展水平有所上升,但地区发展不平衡,东中部地区明显优于西部地区,部分地区特级资质建筑企业出现投入冗余、产出亏损。在科技创新效率影响因素的检验中发现,人力和财力投入并非越多越好,资源之间的匹配度很重要。     

欧元区自救措施缺陷解析

欧元国家的自救措施目前看来虽取得了一定的效果,挽救欧元于将倾,但这些措施中具有明显的缺陷,故欧元的前景依然不甚明朗.本文认为欧元国家自救措施的缺陷有:系统风险未能分散;各国利益博弈特征明显;自救措施的指导思路存在利己性和狭隘性,使自救行动陷入进退两难境地而未能解决欧元区根本问题.     

平台战略内核：网络效应概念演进、测度方式与研究前沿

大量研究虽以平台战略为主题,但并未将网络效应这一平台内核特征纳入分析建模,使得研究缺乏理论深度。采用文献计量和内容分析相结合的方法对网络效应相关研究进行梳理。分析发现：网络效应研究经历了3次理论演进,即同边网络效应向跨边网络效应演进（内容）、网络效应是什么向网络效应有何影响演进（作用）、网络正效应向网络负效应演进（后果）。三大演进从网络效应测度方式和行业情境中亦可窥见。结合关键词突变分析,发现网络效应最新研究已开始从关注网络效应“后果”转向“前因”考察。结合战略管理最新研究趋势,提出未来网络效应前因研究可以从个体行为、关系嵌入、种群生态、制度环境4个层面展开。特别是随着平台模式从消费互联网向产业互联网延伸,网络效应作用和激发方式是亟待关注的研究议题。     

Valuing spread options with counterparty risk and jump risk

In this paper, we investigate spread options with counterparty risk in a jump-diffusion model. Due to the fact that there is no closed-form formula of spread options with counterparty risk, we obtain analytical expressions of lower and upper bounds by employing the measure-change technique. Finally, we numerically check the accuracy of the bounds and analyze the impacts of counterparty risk and jump risk on spread option prices.     

Urban parks: Visitors’ perceptions versus spatial indicators

Urban green spaces and their role in the quality of life of residents have been studied across multiple disciplines, based on empirical measurements or qualitative studies – however, the relation, and its strength, between spatial indicators of urban green spaces and visitors’ perceptions of green spaces are less known. Addressing this knowledge deficit, the present research uses a Geographical Information System (GIS) to link subjective evaluations of the physical environment and objective spatial indicators, to examine the correlation between the perceived and objective characteristics of five urban parks in the city of Szeged, Hungary. A questionnaire survey was used to collect residents’ subjective perceptions of the parks, while objective – which is to say measurable and mappable – spatially explicit indicators of the respective green spaces were calculated using GIS. The subjective evaluations of the parks were matched to the objective indicators using a multiple regression analysis. The statistical analysis yielded two moderate and two minor correlations between the human perceptions of the investigated green spaces and the nine objective environmental indicators examined. These results showed that subjective evaluations and objective data reveal different aspects of the same reality. Therefore, the recommendations from this study are to collectively use human perceptions and objective environmental indicators, both of which are fundamental for adequately capturing the role of urban green spaces in quality of life.