The web proxy location problem in general tree of rings networks

The Web proxy location problem in general networks is an NP-hard problem. In this paper, we study the problem in networks showing a general tree of rings topology. We improve the results of the tree case in literature and get an exact algorithm with time complexity O(nhk), where n is the number of nodes in the tree, h is the height of the tree (the server is in the root of the tree), and k is the number of web proxies to be placed in the net. For the case of networks with a general tree of rings topology we present an exact algorithm with O(kn ²) time complexity.This research has been supported by NSF of China (No. 10371028) and the Educational Department grant of Zhejiang Province (No. 20030622).     

降价表述方式与消费者感知的降价幅度和购买意愿

降价的表述方式通常有相对于原价的百分比降幅和绝对减让幅度两种.本研究分析了这两种降价表述方式对消费者感知的降价幅度和购买意愿的影响,结果表明:在不同的产品价格水平和降价幅度下,这两种降价表述方式对感知降价幅度的影响是不同的.此外,对低价格产品,消费者对价格信息关注的程度会影响他们感知两种降价表述方式下的降价幅度.     

组织文化度量:本土模型的构建与实证研究

本文旨在构建本土化的组织文化度量模型,并检验模型的有效性.作者在质性研究的基础上,从"组织对利益相关者的价值判断"与"组织对管理行为的价值判断"两个角度来构建我国组织文化度量模型.前者由组织对股东、客户、员工、社会大众等组织利益相关者价值判断维度构成,后者由组织文化动力特征、效率特征、秩序特征与和谐特征四个子模块构成.在验证性因子分析中,假设模型得到了很好的验证.本文最后比较了本土化模型与国外已有的重要模型在研究逻辑和方法上的差异,并对我国企业文化建设实践提出了若干建议.     

民营上市公司集团治理与终极控制人侵占效应分析

本文以民营上市公司为样本,采用2002-2004年的面板数据,针对民营上市公司中普遍存在的集团治理现象,理论分析并实证检验了集团治理的各因素对终极控制人行为的综合影响.研究发现,在集团治理条件下,随着控制权和现金流权偏离程度的增加,终极控制人采取具有侵占效应的行为的激励越强.而上市公司的治理结构能够对这一影响起到调节作用,其中,股权结构中的内部股东集团比例增加会强化侵占效应的激励;董事会结构中外部董事比例的增加会抑制终极控制人的侵占效应行为.本文的经验证据表明,在对民营上市公司集团治理结构加强监管的同时,正确认识外部董事的作用、强化董事会的独立性并完善内部机制能够取到良好的治理效果.     

上市公司总经理更换、高管团队重组与企业绩效改进

本文针对以往总经理更换理论研究存在的关键问题,特别是对高管团队重组现象的忽视,构建了新的理论假设,并利用中国上市公司数据进行了检验.研究发现,总经理被迫离职时企业绩效呈现改进之面貌,但常规离职时无此效应;国有控股阻碍了企业绩效改进而内部董事则反之,且在总经理被迫离职情况下,前者负效应减弱而后者正效应增强;总经理是否为竞争者继任对企业绩效改进无显著影响,而选择外部继任对其有显著负面效应;总经理更换后的高管团队重组总体上不利于企业绩效改进,但受到继任类型的调节作用,在外部继任情形下消极影响尤为明显,而对竞争者继任则具有积极作用.     

Idiocentrism, allocentrism, psychological well being and suicidal ideation: a cross cultural study

The present study examined the relationship between idiocentrism, allocentrism, psychological well being (self-esteem, depression, and social support), and suicidal ideation among 283 American college students and 343 Chinese college students. Idiocentrism was correlated with high self-esteem, high depression, and low social support, but the relationships were more likely to be significant for women than for men in both cultures. Allocentrism was primarily related to social support. As predicted, high levels of suicidal ideation were correlated with more idiocentrism, but only for women. Allocentrism was related to lower levels of suicidal ideation in both cultures, but the relationship was small. As suicide prevention may start from suicidal ideation treatment, the treatment of suicidal ideation may have to take into account cultural and personal characteristics, such as idiocentrism.     

On Inverse Problems of Optimum Perfect Matching

As far as we know, for most polynomially solvable network optimization problems, their inverse problems under l ₁ or l norm have been studied, except the inverse maximum-weight matching problem in non-bipartite networks. In this paper we discuss the inverse problem of maximum-weight perfect matching in a non-bipartite network under l ₁ and l norms. It has been proved that the inverse maximum-weight perfect matching under l norm can be formulated as a maximum-mean alternating cycle problem of an undirected network, and can be solved in polynomial time by a binary search algorithm and in strongly polynomial time by an ascending algorithm, and under l ₁ norm it can be solved by the ellipsoid method. Therefore, inverse problems of maximum-weight perfect matching under l ₁ and l norms are solvable in polynomial time.     

对组织学习、核心竞争能力、战略柔性与企业竞争绩效的理论剖析与实证研究 --探索中国企业增强动态竞争优势之路

在当前超强竞争时代,组织学习、核心竞争能力和战略柔性,越来越成为企业竞争的焦点问题,成为企业营造持久的动态竞争优势的战略武器.本文在对前人有关研究进行回顾、总结和归纳的基础上,开创性地把企业核心竞争能力划分为技术能力、市场营销能力和整合能力这三个关键构成要素,识别出组织学习的三个关键维度,深入剖析了战略柔性的内涵与本质,并在此基础上,论述了它们之间的互动关系及其对企业竞争绩效的影响.最后,本文以来自中国企业的实际调研数据为基础,运用基于偏最小二乘法的结构方程模型(SEM),对上述问题进行了实证分析,剖析了本项研究对中国企业管理的启示.     

公司财务理论的企业基础

本文以公司财务理论的企业基础为切入点,从理论上分析了不同企业界定对公司财务理论(主要涉及到资本结构理论、公司治理理论、定价理论等层面)的影响效应。在此基础上,基于当代企业特征的现实性变迁,本文认为传统的公司财务理论正面临严重挑战。     

感知实绩、顾客满意与顾客忠诚--微观层次上的审视

最近几十年来,对顾客满意-企业利润之间关系的认识不断深化,使得对顾客满意的研究得到了很大的发展.其中,顾客忠诚被认为是顾客满意影响企业利润的中介.然而,对于顾客满意影响顾客忠诚的微观过程,目前缺乏一致的结论.我们采用声誉、重复消费意向和推荐他人消费意向作为中间变量,对顾客感知实绩、满意和忠诚之间的因果联系进行了实证研究.结果表明,顾客满意同顾客忠诚之间并无直接的因果联系,因此,企业在制定市场份额策略时,不应该仅局限于提高感知实绩和顾客满意的范畴,而应从多个角度出发来提高顾客忠诚.