Alienation and its correlates: A meta-analysis

We provide a meta-analysis of alienation, outlining the extent to which it is predicted by individual differences (need for achievement), role stressors (role conflict), leader dimensions (initiating structure), and aspects of the work context (formalization). We also examine its relationship with outcomes such as employee attitudes (job satisfaction), performance (task performance), withdrawal (absenteeism), and side effects (drinking). We examined these relationships based on data from 45 primary studies and 227 statistically independent relationships. Our meta-analysis provides cumulative evidence for effect sizes across multiple settings and respondents, clarifies ambiguous aspects of the construct, and presents more information on the extent to which alienation can be seen as the opposite of job involvement.     

数字经济理论体系与研究展望

以新一代信息技术为基础的数字经济日益成为推动经济发展的重要动力,但相关数字经济理论研究滞后,难以准确解释新经济现象和更有效指导新发展阶段下经济高质量发展实践.本文聚焦数字技术变革对相关经济学基本理论发展的影响,力图助推中国特色数字经济理论体系的创建.通过对国内外相关主题文献进行系统梳理,文章首先提炼了数字经济理论发展中的重要科学问题,以此为逻辑起点,基于"内涵特征—现实表现—核心理论—方法体系"学理链,构建了一个数字经济理论体系框架.其次,本文相继阐释了理论体系框架中的数字经济内涵与特征、数字经济核心理论,以及技术变革下的数字经济研究方法体系.最后,本文讨论了数字经济理论体系的拓展及未来研究方向.     

中国贫困治理经验总结:扶贫政策能够实现有效增收吗?

本文利用建档立卡脱贫户的实际调查数据,使用收入组合的Copula熵作为分裂标准构建决策树模型,用以评价单项扶贫政策对家庭收入的影响,进而通过划分不同收入水平及相依结构的家庭群体,评价不同政策组合的增收效果.研究发现:第一,不同扶贫政策组合所划分的家庭收入分布存在显著差异;第二,兜底保障、就业扶贫和扶贫小额信贷是增收效果最为显著的三项政策;第三,对于家中有劳动力的极端贫困家庭,兜底保障与就业扶贫的政策组合更能发挥出稳定的增收效应;对于不需依靠兜底保障类政策的一般贫困家庭,产业扶贫政策的增收效果更为显著.故本文认为有必要对不同贫困群体采用针对性的扶贫政策组合,并提出了相应的政策建议.     

拥挤的空间,挤压的时间——竞争思维模式的中介作用和经济流动性感知的调节作用北大核心CSSCI

社会拥挤和时间稀缺感是当前社会两大普遍问题,目前尚欠缺对两者因果关系的研究。基于隐喻理论和社会拥挤的新近研究,通过四个实验探讨社会拥挤对时间稀缺感的影响。研究结果表明,社会拥挤增强消费者的时间稀缺感,即“拥挤的空间,挤压的时间”效应;消费者的竞争思维模式在该效应中发挥中介作用,经济流动性感知对该效应起调节作用。此外,进一步探究了该效应引起的系列行为结果。本文拓宽了隐喻理论的应用范围,丰富了社会拥挤的消费者认知研究。     

Lease or financial lease? Deterministic strategies for on-line financial lease problem with the second-hand transaction

Journal of Combinatorial Optimization - The residual value of the equipment is an important and inevitable issue for any decision-making process of equipment leasing. In this paper, we present an...     

A New delay control method for real-time flows

This paper presents a novel control algorithm to decrease the worst-case delay bound for high rate homogeneous and heterogeneous real-time flows when the network traffic load becomes heavy. The algorithm is adaptive based on the instantaneous network situations. It employs a generalized form of traditional (σ,ρ) regulator called the generalized (σ,ρ,λ) regulator that operates like the (σ,ρ) regulator under the normal network traffic load situation, but provides more regulations for the heavy network traffic load situation. For a set of real-time flows, we can show that D _rg ≤D _g where D _rg and D _g are the worst-case delay bounds with the (σ,ρ,λ) regulator and the (σ,ρ) regulator respectively. More specifically, we have developed a set of formulas to set the parameters for the new regulator so as to reduce the worst-case delay bounds for the real-time flows. We can prove that there exists a threshold input rate ρ^* such that D _rg = D _g for ρ≤ρ^* and D _rg < D _g for ρ > ρ^*. When the average input rate of real-time flows is very high, the generalized regulator can effectively control the delay. The extensive experiment data match our theoretical results. The part of this paper has been appeared in The 23 ^rd IEEE International Conference on Distributed Computing Systems, 2003. The work is supported by CityU strategic grant Nos: 7001777 and 7001709 and CityU ARP Project No. 9610027. H. Wang was partially supported by National Natural Science Foundation of China (10471088, 60572126) and CityU strategic grant no. 7001709. Wanqing Tu is now with Department of Computer Science, The Hong Kong University of Science and Technology. Clear Water Bay, New Territories, Kowloon, Hong Kong.     

产品众筹中价格歧视策略的优化研究

产品众筹是一种常见的众筹形式,它要求企业为支持者提供创新型产品或服务作为回报。合理的定价策略是产品众筹的关键,本文分别从项目成功率和利润最大化角度研究价格歧视的优化问题。针对产品众筹全有或全无（All-or-Nothing,AoN）的机制下采用价格歧视策略时,价格差值和低价销售定额的最优决策问题。本文首先采用随机模型定义购买概率函数,分析支持者在购买过程中的影响因素;然后从项目支持者效用角度出发,应用两阶段模型讨论价格差值的相关影响因素,研究发现两级价格差值会受到级联效应、项目的特征以及支持者特征的影响。并且从支持者估值类型方向对基础模型进行了扩展,讨论了不同估值类型的支持者在不同价格差值范围内的选择行为;再则从项目的利润最大化角度出发讨论价格差值问题,研究发现价格差值受支持者数量和项目目标值的影响;最后通过计算相对利润函数解出最优低价销售定额的数量。