薪酬参照体的效应研究:基于多表征的路径模型与相对重要性

参照体选择在分配公平、薪酬满意研究中扮演重要角色,而以往研究多是关注焦点对象与参照体在薪酬上的数量差异。本文认为,参照体"数量差异"并不能完整表征参照体的效应,为此提出了"信息知晓度"、"判断关联性"、"比较频率"、"数量差异"等四类表征,在理论基础上构造路径模型与研究假设。实证研究表明,信息知晓度、判断关联性正向影响特定参照体的比较频率;数量差异正向影响分配公平、薪酬水平满意,比较频率负向影响分配公平、薪酬水平满意。通过三种研究路径的比较研究证实,自我生活成本等七类参照体相对重要。未来亟需就参照体选择的相关机制在纵贯上、在不同的组织情境下及考虑个体差异等方面予以深入考察。     

公平感对供应链成员定价决策影响的研究

本文研究公平感对由一个供应商和一个零售商组成的二级供应链中的定价决策的影响,其中供应商决定批发价格,零售商在接受供应商批发价格合同之后决定零售价格,市场需求受到零售价格的线性影响.采用管理实验方法得出,首先,供应商的批发价格和零售商的零售价格均分别低于完全理性假设下的均衡解;供应商是利他性的,即,乐于看到零售商收益的增加,并且,供应商认为零售商是完全理性的,即零售商的决策目标是最大化自身收益;然而,零售商却是刻毒性的,即乐于看到供应商收益的减少.其次,批发价格的变异度大于零售价格的,即供应商决策的难度大于零售商的.给管理者的启示是:供应商应考虑零售商的刻毒性的特征,降低批发价格,以提高零售商接受供应商所提批发价格的概率;此外,还应该为供应商提供辅助决策手段,以降低批发价格的变异度,提高决策的准确性     

Online MapReduce scheduling problem of minimizing the makespan

MapReduce system is a popular big data processing framework, and the performance of it is closely related to the efficiency of the centralized scheduler. In practice, the centralized scheduler often has little information in advance, which means each job may be known only after being released. In this paper, hence, we consider the online MapReduce scheduling problem of minimizing the makespan, where jobs are released over time. Both preemptive and non-preemptive version of the problem are considered. In addition, we assume that reduce tasks cannot be parallelized because they are often complex and hard to be decomposed. For the non-preemptive version, we prove the lower bound is \(\frac{m+m(\Psi (m)-\Psi (k))}{k+m(\Psi (m)-\Psi (k))}\), higher than the basic online machine scheduling problem, where k is the root of the equation \(k=\big \lfloor {\frac{m-k}{1+\Psi (m)-\Psi (k)}+1 }\big \rfloor \) and m is the quantity of machines. Then we devise an \((2-\frac{1}{m})\)-competitive online algorithm called MF-LPT (Map First-Longest Processing Time) based on the LPT. For the preemptive version, we present a 1-competitive algorithm for two machines.     

Exploration and Firm Performance: The Moderating Impact of Competitive Strategy

In this study we examine the moderating effect of competitive strategy (including differentiation and cost‐leadership strategies) on the relationship between exploration and firm performance. We find that the moderating effect of differentiation strategy is positive while that of cost‐leadership strategy is negative. And, these moderating effects are stronger in a highly competitive context. This study offers an explanation for previous mixed findings on the linkage of exploration to firm performance and enriches the discipline's knowledge regarding the performance implications of exploration. Moreover, we respond directly to the appeal in research on competitive strategy to clarify the role played by competitive strategy in profiting from exploration.     

基于特化系数的我国区域科技投入结构演变分析

在从跟随模仿向自主创新战略转变的背景下,政府科技投入已经成为战略性公共资源。本文运用特化系数测算了1999年至2006年我国八大经济区科技投入来源结构与执行结构的演变。研究结果表明:1999年至2006年,我国科技投入来源结构呈现出从政府主体向企业主体转变的趋势,南部沿海和东部沿海企业来源资金实现了从非特化向特化的转变;科技投入执行结构呈现出从大中型企业和科研机构双主体向企业单主体转变的趋势,南部沿海企业执行资金实现了从非特化向特化的转变。     

On domination number of Cartesian product of directed paths

Let γ(G) denote the domination number of a digraph G and let P _m □P _n denote the Cartesian product of P _m and P _n , the directed paths of length m and n. In this paper, we give a lower and upper bound for γ(P _m □P _n ). Furthermore, we obtain a necessary and sufficient condition for P _m □P _n to have efficient dominating set, and determine the exact values: γ(P ₂□P _n )=n, g(P₃\square P_n)=n+é\fracn4ù\gamma(P_{3}\square P_{n})=n+\lceil\frac{n}{4}\rceil, g(P₄\square P_n)=n+é\frac2n3ù\gamma(P_{4}\square P_{n})=n+\lceil\frac{2n}{3}\rceil, γ(P ₅□P _n )=2n+1 and g(P₆\square P_n)=2n+é\fracn+23ù\gamma(P_{6}\square P_{n})=2n+\lceil\frac{n+2}{3}\rceil.     

基于UHF-EGARCH模型的股指期货市场实证研究

利用沪深300股指期货高频数据研究其日内效应和波动性特征.将高频数据所特有的价格持续期引入到GARCH模型中,并考虑到收益率序列波动的非对称性,建立UHFEGARCH模型,分别选取1分钟、10秒钟、1秒钟采集频率的数据进行实证,采用线性样条函数剔除日内效应影响,进一步研究短期波动性,并画出相应的非对称冲击曲线.研究结果表明,基于3种采集频率数据的绝对收益率和价格持续期呈现明显的周末效应和日内效应,绝对收益率的日内效应基本上呈W型,价格持续期的日内效应有U型、L型、W型和倒U型4种形态并存,并不是某种单一的形态;短期波动性具有明显的集聚性和非对称效应,其中坏消息的影响强于好消息的影响.     

Optimal Digital Rights Management with Uncertain Piracy

Many firms that sell digital copies of copyrighted materials online face a common dilemma: the use of digital rights management (DRM) to impede pirates can impose restrictions on legitimate use. We introduce a two‐period model in which the use of DRM in the first period affects the probability that a consumer finds a pirated copy in the second period; the threat of legal action reduces consumers’ consumption of pirated copies; and firms choose whether to sell, and at what prices, either strongly or weakly DRM‐protected products, or both. Furthermore, we incorporate the role of uncertainty concerning future levels of piracy. Using a two‐period model with uncertainty, we investigate a firm's optimal DRM strategies and present the optimal pricing strategy as well as product launch strategy under different market conditions. We find that one important characteristic of the optimal strategy is that it is optimal to maintain the same product line configuration strategy for both periods. We also characterize the conditions under which each strategy is optimal.     

Who performs a stronger response to whom? Detecting individual competitive actions and reactions

This study analyzes the degree of competition through individual actions and reactions. Empirical support for this analysis has derived mainly from structural econometric models describing the nature of competition. This analysis extends the existing literature by empirically considering a direct measurement of competition through the analysis of the competitive actions and responses, and describing how firms compete within and between strategic groups. We estimate the firms’ conduct in the Spanish deposits market with 146 firms and 18,888 observations. This is a specially compelling context for the banking industry, in which a deregulation process gives rise to the adoption of aggressive strategies seeking to increase the market shares of deposit accounts; thus, producing a turbulent situation of increasing rivalry. Our results offer a deeper understanding of the firms’ competitive behavior, since we identify different patterns of actions and reactions depending upon the strategic group the firm belongs to.     

顾客导向和创新导向对企业绩效的影响机制研究

在市场导向相关研究的基础上.本文探索了顾客导向(Customer Orientation)以及创新导向(Innovation Orientation)经由组织学习(Organizational Learning)对公司绩效(Firm Performance)的影响.通过对欧洲的390家制造企业的调查.发现顾客导向和创新导向都对组织学习产生正向影响,组织学习提高了公司的新产品绩效(New Product Performance).最终提升了公司绩效.最后,文章讨论了本研究的理论和实践意义,以及未来的研究方向.