Strategic Information Sharing in Competing Channels

We investigate strategic information sharing in two competing channels. The retailer in a channel can ex post decide whether to share private demand information with his upstream manufacturer after the content of information becomes known. We find that a retailer discloses low demand and withholds high demand to induce lower wholesale prices from his manufacturer. We show that a retailer should share less information when the retail market becomes more competitive, but should disclose more information when his capability to acquire information improves. When a decentralized supply chain competes with an integrated channel, we show that firms in the supply chain benefit from the rival channel's effort to improve information capability, that the incentive for the retailer in the supply chain to improve his information capability increases with the intensity of competition and with the rival channel's information capability, and that the retailer may not want to pursue perfect information acquisition even when doing so is costless. Extensive numerical studies demonstrate that similar results also hold for two decentralized supply chains competing with each other.     

信息系统成本与效益评估方法分析

介绍了信息系统成本与效益评估的几种方法,并且分别讨论了这些方法的优缺点,为投资方在投资信息系统项目时提供有效的参考依据.     

ERP项目咨询与监理融合机制的研究

结合实际企业ERP系统实施过程中咨询与监理的经验,讨论了ERP项目咨询与监理及其融合的必要性、特点和运作规律.     

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.     

Deterministic construction of compressed sensing matrices based on semilattices

A central problem in compressed sensing is the construction of sensing matrices. In this paper, we show how to construct sensing matrices by using semilattices, and give many examples of sensing matrices constructed from specific semilattices. Moreover, we show that the new construction for some examples with small parameters gives better sensing matrices compared with previously known constructions.     

基于延期交割费的我国燃料油期现货价格关系辨析

本文基于延期交割费的描述性统计分析,发现国内燃料油期现货市场间存在延期交割费。利用经验模态分解(EMD)方法,本文将延期交割费的影响因素分为短期市场波动、中期经济自然环境影响及长期趋势,分别对应EMD结果中的高频、低频和趋势分量。在此基础上,本文通过ARMA-GARCH模型度量燃料油市场价格风险,检验了延期交割费与燃料油市场价格风险之间的关系。结果显示延期交割费一定程度体现了市场价格风险,反映出上海燃料油期货市场的有效性。     

合作研发中知识产权风险对合作行为影响的研究

知识产权风险已成为合作研发企业所面临的三大风险之首,因此,本文采用结构方程模型(SEM)结合243家企业的有效调研数据,实证分析了知识产权风险对企业合作行为的影响作用,并有助于企业在合作中针对所面临知识产权风险类型的不同来采用不同的措施进行动态防范。     

上市公司现金流操控动机选择研究

对现金流管理的研究是继盈余管理后兴起的管理层舞弊行为研究。在已有关于现金流操控阈值点研究的基础上,以2004年至2009年有分析师预测值的中国上市公司为样本,运用条件分布法,采用统计变量τ和z计算分布频率,并以分布频率直方图直观显示,分析上市公司在现金流量阈值点操控行为的动机选择。从统计结果和分布频率图可知,公司管理层对3个现金流阈值点确实存在不同选择。操控现金流微正的动机最强,即公司管理层更注重报告微正现金流量,其次是超越往年现金流量动机,而迎合分析师预测的动机最弱。研究还发现,管理层存在多重操控动机,即在控制已达到某一个阈值点之后,公司管理层更倾向达到另一个阈值点,存在好上加好的心理。     

One-dimensional optimal bounded-shape partitions for Schur convex sum objective functions

Consider the problem of partitioning n nonnegative numbers into p parts, where part i can be assigned n_i numbers with n_i lying in a given range. The goal is to maximize a Schur convex function F whose ith argument is the sum of numbers assigned to part i. The shape of a partition is the vector consisting of the sizes of its parts, further, a shape (without referring to a particular partition) is a vector of nonnegative integers (n₁,..., n_p) which sum to n. A partition is called size-consecutive if there is a ranking of the parts which is consistent with their sizes, and all elements in a higher-ranked part exceed all elements in the lower-ranked part. We demonstrate that one can restrict attention to size-consecutive partitions with shapes that are nonmajorized, we study these shapes, bound their numbers and develop algorithms to enumerate them. Our study extends the analysis of a previous paper by Hwang and Rothblum which discussed the above problem assuming the existence of a majorizing shape. This research is partially supported by ROC National Science grant NSC 92-2115-M-009-014.