基于价格折扣的易腐物品供应链库存的协作控制研究

库存作为供应链上的重要环节,越来越受到企业界和学术界的关注.但是目前对于供应链库存协作控制的研究大多假设库存货物能无限期存放,很少考虑产品在存贮过程中发生的变质、减值等情况,因此现有的以一般产品为对象的供应链库存协作控制研究并不适用于易腐物品.本文以易腐物品为对象,研究如何用价格折扣的激励方式来实现对易腐物品二级供应链库存的协作控制,从而最终达到优化供应链库存的目的.     

服务产品价格的范围与振荡收敛性研究

服务提供商占有服务创造的价值的问题必然涉及到对服务产品的定价。通过使用价格和服务量共同来描述服务价值的创造与分配,用服务产品的价格的确定来实现价值的分配,用不同的价格决定权和博弈顺序来确定服务产品的价格范围,然后寻求一种服务产品价格的振荡系统,使得服务产品的价格最终收敛于总价值创造最高的价格。     

基于订单驱动市场下信息结构与金融资产价格均衡研究

依据我国证券市场订单驱动连续竞价交易机制,在引入信息结构及投资者看法差异的基础上建立序贯交易理论模型,研究金融资产价格的形成过程,并研究信息结构各方面对价格形成的影响。理论结果表明,信息存在、信息分布和信息组成对买卖价差产生不同影响,其影响结果不仅取决于信息结构自身,也受到投资者构成、看法差异以及信息量值的影响。随后基于中国证券市场进一步验证了理论模型的结论。     

提前期、构建成本和短缺量拖后率均可控的EOQ模型

传统库存模型通常将提前期和构建成本视为不可控制。事实上可以通过追加投资缩短提前期和降低构建成本。缺货期间,为减少订单丢失量和补偿顾客的损失,供应商会给予一定的价格折扣。现实库存系统中,容易得到需求的期望值和标准差,但较难得到其分布规律。基于此,考虑短缺量拖后率与价格折扣和缺货期间库存水平相关,提出了一种需求为任意分布且提前期和构建成本均可控的EOQ模型,证明了模型存在唯一最优解,给出了一种寻优算法。数值仿真分析表明,一般情况下,压缩提前期和降低构建成本能降低订购批量和安全库存,降低库存总成本;短缺量拖后系数和缺货概率对库存总成本影响较大,企业应尽量降低缺货概率,尤其在短缺量拖后系数较小时。     

长期冲击、价格调整与股票组合收益的互相关关系

本文研究了以流通规模为基础的大、小股票组合之间的互相关关系。小股票组合对大股票组合显著为负的滞后引导关系表明基于价格调整速度差异的信息扩散机制在我国股市并不存在,这需要结合我国证券市场特定的投资者构成和投资行为才能给予可能的解释。组合收益率的长记忆性对互相关关系检验的有效性有着不可忽略的影响,在剔除长期因素的影响之后,组合之间的互相关关系有所减弱或消失。     

三级供应链应对突发事件的价格折扣契约研究

针对一个供应商-制造商-零售商构成的三级供应链,在考虑随机性需求基础上,探讨突发事件对三级供应链的影响,同时改进了协调供应链的价格折扣契约,使之具有抗突发事件性,并讨论利润分配情况,最后通过仿真给出具体的算例.     

Ranked Items Auctions and Online Advertisement

We study auctions for a set of commonly‐ranked items where each buyer has unit demand. This setting has promising applications in areas such as keyword auctions in the search engine advertising industry, the sale of quality‐ranked raw materials, etc. An auction mechanism suitable for this setting is the simultaneous pooled auction (SPA), where each bidder simultaneously submits a single bid and is allocated an object based on the rank of his bid among all the bids. We study how to improve the seller's expected revenue by enforcing a reserve price in an SPA. We find that the use of an appropriate reserve price may significantly increase the seller's revenue, especially when the number of items for sale is relatively large compared to the number of participating bidders. One inherent problem in the SPA is that some bidders may incur ex post losses; that is, they pay more than what they value the received objects. We propose a tailored VCG mechanism that generates the same expected revenue as the SPA does, while bidders do not incur any ex post loss. We also discuss the potential applications of this research to keyword auctions.     

Private Ownership versus Institutional Ownership: Exclusion Pricing of Initial Public Offerings

The authors examine the literature with respect to the pricing of initial public offerings and focus upon the relationship of pricing to the structure and conduct of the investment banking industry. Using a data base of all share offerings undertaken in the United States over a two and a half year period, the authors find that there is considerable evidence for the proposition that large, prestigious, and well capitalised investment banks tend to price their share offerings at a higher absolute level than those not meeting such characteristics. Using classical statistical methods, the authors find that the pricing strategy of investment banks is connected to their affiliation with investment funds and unit trusts. The motives for such pricing strategies, the authors argue, lie with the affiliation of investment banks with investment funds, suggesting that the pricing of new share offerings may be a means of excluding retail investors from participating in the strong returns such issues exhibit. The authors raise legal and regulatory implications of their findings in the context of the general consolidation observed within the investment banking industry. This revised version was published online in July 2006 with corrections to the Cover Date.     

不同带宽ISP 的定价博弈与结盟动因分析

不同带宽的网络接入服务商( ISP) 需要有不同的定价策略. 在消费者的单位时间成本不 同情况下,分析了网络接入商的定价博弈. 通过比较静态和动态的纳什均衡价格与收益,得到 了接入服务商的先动优势,也得到了技术进步对宽带接入的有利性. 然后分析了形成价格联盟 后的最优定价,得出了不同带宽的接入服务商之间具有形成价格联盟的激励的结论,并使窄带 接入退出市场. 最后探讨了结成价格联盟以后社会总福利的变化情况,指出这种结盟对于社会 整体来说是无益的.     

金融市场多标度分形现象及与风险管理的关系

已有研究通过对汇率、股票收益率、黄金价格等金融市场实证数据的分析,发现这些数据 具有多标度分形(multifractal) 特征. 通过对中国金融市场的代表数据之一———上海证券交易 所综合股价指数(SSECI) 的研究得出了相似的结论,并且初步提出了运用多标度分形理论所 提供的信息来进行金融风险管理的风险管理思路.