基于股利变更公告的股利信号效应研究

本文根据上市公司发布的股利变更公告,提供了一个比之前文献利用年报研究股利市场反应更为干净的方法,研究上市公司股利发放的市场反应。本文进一步研究了各种股利发放变动与公司现金流、盈余之间的关系,从而对上市公司股利政策的信号传递效应进行检验。结果发现,我国上市公司的现金股利发放并没有信号传递效应;股票股利发放只是传递了关于公司当期净利润的信息,并没有传递关于公司未来盈余的信息。具体来说,市场对现金股利变更的反应不及对股票股利变更的反应敏感;同时发现,现金股利的变更与公司现金流、盈余之间并没有显著关系,而股票股利的变更则参考了当期净利润的表现。     

前摄性行为视角下的员工创新——前摄型人格、反馈寻求与员工创新绩效

随着外部环境日渐复杂,新一代员工自我意识觉醒,信息化工作模式扩展,企业传统管理机制对员工绩效的影响越发有限。利用员工自我管理机制以及前摄性行为提升其自身创新绩效的管理路径有望成为持续增强企业创新实力的新方法。研究以国有科技型组织中的知识员工为样本,以主动反馈寻求行为为中介,探索前摄型人格对员工创新绩效的影响机制。研究结果表明,员工前摄型人格对其创新绩效具有正向影响;反馈寻求行为(询问与监测)完全中介前摄型人格对创新绩效的影响;主管对创新的支持正向调节直接反馈寻求行为——询问与创新绩效的关系,具有创新性同事的存在正向调节间接反馈寻求行为——监测与创新绩效的关系。     

地区差异会影响金融与实体之间的相互转化程度吗?——基于我国制造业上市公司的微观视角

实体经营与金融投资的有机结合被认为是实现我国制造业由大到强崛起的一个重要途径.本文从我国地域特征着手,探讨了制造业企业金融资产和经营收益之间的资源配置选择与效率呈现出的地域性的差异.结果 表明,东部地区上市企业经营收益越高,则会有更多资产投资于金融资产.但是,金融资产对经营收益的"挤占效应"却是西部地区更严重.而地区的金融市场发达程度、地方政府干预程度这两个地区软环境指标能够解释上述差异产生的原因.随着金融市场发达程度的增高和地方政府干预程度的下降,金融对经营收益"挤占效应"的负向边际效果逐渐下降,说明政府与市场环境的改善能够显著提升金融与实体之间的资源配置效率.因此,提高落后地区的软环境水平有利于引导制造业企业"脱虚向实".     

Genetic distance,international experience and the performance of cross-border R&D for EMNEs

Cross-border R&D can contribute to the enhancement of independent innovation capabilities of emerging markets multinational enterprises (EMNEs) by benefiting from knowledge management. However, scant research exists examining the location impact of cross-border R&D for EMNEs on performance implications. This paper fills this important theoretical gap by building upon the literature of genetic distance in connection with knowledge management. We use a panel data of Chinese high-tech listed companies to empirically examine the impact of genetic distance on the performance of cross-border R&D and the role played by international experience. Our results reveal a positive relationship between genetic distance and the performance of cross-border R&D. Importantly, we highlight the motivation for cross-border R&D of EMNEs to acquire technical knowledge magnifies the positive effects of genetic distance and performance. Furthermore, our analysis indicates that international experience significantly enhanced the positive effect of genetic distance on cross-border R&D performance. We conclude this paper by discussing theoretical contributions to genetic distance, international management and knowledge management, as well as practical implications for cross-border R&D of EMNEs.     

Online MapReduce processing on two identical parallel machines

In this work we investigate the online over-list MapReduce processing problem on two identical parallel machines, aiming at minimizing the makespan. Jobs are revealed one by one, and each job consists of one map task and one reduce task. The map task can be arbitrarily split and processed on both machines simultaneously, while the reduce task has to be processed on a single machine and it cannot be started unless the map task has been completed. We first show that the general case of the problem reduces to the classical two machine online scheduling model with an optimal competitive ratio of 3/2. For a special case where the map task is at least as long as the reduce task, we prove that no online algorithm can be less than 4/3-competitive. An optimal Greedy algorithm with a matching competitive ratio is proposed as well.     

考虑实时预倒箱的出口箱堆场多场桥调度优化

在出口集装箱堆场的实际作业过程中,倒箱是制约场桥作业效率的瓶颈之一。为提高出口箱堆场的作业效能,减少船舶装船作业时间,采用实时预倒来降低倒箱的影响,研究出口箱堆场多场桥调度优化问题。考虑待提箱作业次序固定、场桥间保持安全距离及不可跨越的现实约束,兼顾内集卡的等待上限,侧重场桥作业过程中的实时预倒箱,构建了以带惩罚因子的内集卡总等待时间最少为目标的混合整数线性规划模型。基于问题自身的特点设计了混合和声模拟退火算法,得出了各场桥的行走路径与实时预倒箱方案。在算例实验中,通过与不考虑实时预倒箱的方案、FCFS方案以及下界进行对比,验证了考虑实时预倒箱的场桥调度模型及算法的有效性,为集装箱码头出口箱堆场的场桥调度提供参考。     

Fibonacci helps to evacuate from a convex region in a grid network

This study considers an evacuation problem where the evacuees try to escape to the boundary of an affected area, which is convex, and a grid network is embedded in the area. The boundary is unknown to the evacuees and we propose an online evacuation strategy based on the Fibonacci sequence. This strategy is proved to have a competitive ratio of 19.5, which is better than the best previously reported result of 21.     

论迁移规律及其在物理教学中的重要作用

迁移规律是教育学研究的重要内容之一,本文认为,其核心在于认识和把握不同事物或现象之间的相似性,并给出了案例分析和哲学论证。     

通信原理中调制技术的四维思维空间

本文首先分析了通信原理课程中调制技术的特点,然后讨论了如何在教学实践中运用四维思维空间法。     

劳动合约原论——分工对合约的关系及其理论应用

演绎分工和合约的逻辑关系,本文引出了“企业本质是劳动合约”的理论命题。即从唯物史观与劳动价值论(劳动过程)具有相互内涵的观点看,企业是对劳动合约的特别运用,应当把企业组织的性质本质规定为劳动合约,而把劳动合约本质规定为企业组织性质的动态的历史演化过程,从而实现企业的静态本质与动态本质的统一。进一步,也就可以凭借其打通尚存于两大企业理论体系之间的“理论瓶颈”,拓宽两大企业理论沿“异同性质”层面进行互补生长和发展的理论空间。这一命题的论断以及推导完全符合马克思经济学的基本纲领和研究框架性质。