基于泊松跳跃的最佳并购时机比较研究

基于最优停时理论、实物期权方法、平滑粘贴条件和道格拉斯生产函数转换,通过时机模型构建与求解,比较分析了无泊松跳跃和有泊松跳跃两种情形下的最佳并购时机。研究结果显示,驱动企业并购的主要是协同效应;企业并购存在仅与并购双方相对股价有关的最佳并购时机及其对应的并购区域;泊松跳跃使并购阈值下界和并购阈值上界右移,并购区域变宽,选择最佳并购时机需要更多信息;在相对股价进入并购区域时,即可实施并购,否则,主并方的最佳策略为持有等待期权,即继续等待。研究结论可为企业选择最佳并购时机,尤其是国有企业选择产权转让的最佳时机提供直接理论指导和实践借鉴。     

超竞争环境下企业困境并购定价与时机选择的期权博弈分析

基于期权博弈理论,以超竞争环境为研究背景,在多个主并企业合作的情形下,建立目标企业存在财务困境的并购模型,得出主并方的最优并购时机;并进行数值模拟分析,重点分析了代表超竞争特点的三个变量(竞争强度、竞争不确定性、企业价值损失因子)、主并企业联盟中参与者的重要程度及联盟中发生机会主义的概率、企业困境因子这六个变量对并购阈值的影响。     

基于期权博弈的跨国并购实证分析——以联想并购IBMPC为例

将实物期权定价方法引入到讨价还价谈判博弈中,分别建立了完全信息和不完全信息跨国并购期权博弈模型,并应用纳什讨价还价定理求出了其中不完全信息博弈的唯一解,以及完全信息博弈的解区间.该模型证明期权估值法具有普遍意义, DCF估值法是跨国并购中的一种特例,最后,通过联想并购IBM PC案例检验了模型的基本结论.     

不完全信息下考虑效率和规模的多时点并购决策

针对企业并购过程中存在不完全信息和多时点信息的问题,提出了一种考虑效率和规模的企业并购决策方法. 通过证据推理集结并购双方的不完全的、多时点的评价信息,利用\,DEA\,方法判断合并企业规模是否过大,并筛选出可行并购方案,再根据合并企业竞争型并购交叉效率高低决策最佳并购目标. 最后算例分析说明了方法的有效性和实用性.     

不完全信息下三度价格歧视的有效性研究

基于不完全信息静态博弈模型,讨论了相互竞争的两厂商在双方都掌握的线性需求函数和一方随机选取的线性成本函数这样的不完全信息情况下实施三度价格歧视的有效性问题,且给出了双方实施三度价格歧视的最优产量,最优价格以及最大利润公式,并把相关结论与基于完全信息静态博弈的三度歧视定价和不完全信息静态博弈的统一定价进行对比,得出了许多重要的结论.     

全流通格局下沪市主并上市公司并购绩效研究

以全流通格局下2007年发生并购的56家上市公司为样本,应用超常收益方法对沪市主并上市公司并购的绩效进行实证研究.结果表明:主并上市公司并购后绩效呈上升趋势;在横向并购、纵向并购和混合并购三种方式中,纵向并购的效果优于横向并购和混合并购,而横向并购与混合并购对绩效的影响区别不明显.     

存货质押三方契约中银行对物流企业的激励

存货质押贷款是解决中小企业融资难问题的主要贷款渠道,已有文献缺乏对监管人的分析。运用激励理论,拓展分析存货质押三方契约背景下物流企业提供信息服务时的激励问题。分别在卖方垄断和完全竞争两种市场结构下,构建优化模型并求解,结论是若银行对物流企业信息服务努力程度具有完全信息时,固定委托费用合同是最优激励合同;若银行具有不完全信息时,分成合同是最优激励合同;若物流企业受到有限责任约束,应采用固定委托费用合同。     

基于税率因素的中间产品转移定价研究

在中间产品转移定价过程中引进税率因素.在中间产品价格采用成本加成定价法的条件下,分别基于下游企业对上游企业的单位成本具有完全信息和不完全信息两种情况,对厂商的中间产品定价方法进行了研究,得出具有完全信息的企业总利润大于不具有完全信息的企业总利润的结论.并在此基础上通过变化的成本加成率建立了减少上游企业提供不真实单位成本导致利润损失的模型.     

谁会成为王子

大部分的并购都具有耗时长、所需资金量大、牵扯相关利益方多的特点。如果真能做到“天时地利人和”，那并购成功的概率无疑会大得多。     

风险企业融资行为的逆向选择博弈模型研究

利用博弈论理论建立了风险企业融资行为的逆向选择信号传递博弈模型,分完全信息和不完全信息两种情况,对影响风险投资家努力水平的因素进行了分析,得出产权结构不合理、控制权分配失衡和风险企业家的寻租行为是造成风险投资家努力水平不高的主要原因,并给出了相应的对策建议.     

Affine-inscribed and affine-circumscribed polygons and polytopes

Five theorems on polygons and polytopes inscribed in (or circumscribed about) a convex compact set in the plane or space are proved by topological methods. In particular, it is proved that for every interior point O of a convex compact set in ℝ³, there exists a two-dimensional section through O circumscribed about an affine image of a regular octagon. It is also proved that every compact convex set in ℝ³ (except the cases listed below) is circumscribed about an affine image of a cube-octahedron (the convex hull of the midpoints of the edges of a cube). Possible exceptions are provided by the bodies containing a parallelogram P and contained in a cylinder with directrix P. Bibliography: 29 titles. Translated fromZapiski Nauchnykh Seminarov POMI, Vol. 231, 1995, pp. 286–298. Translated by B. M. Bekker.     

Partitions and pairwise sums and products

A seven cell partition of N is constructed with the property that no infinite set has all of its pairwise sums and products in any one cell. A related Ramsey Theory question is shown to have different answers for two and three cell partitions.     

Linear birth and death models and associated Laguerre and Meixner polynomials

We study birth and death processes with linear rates λ_n = n + α + c + 1, μ_{n + 1} = n + c, n 0 and μ₀ is either zero or c. The spectral measures of both processes are found using generating functions and the integral transforms of Laplace and Stieltjes. The corresponding orthogonal polynomials generalize Laguerre polynomials and the choice μ₀ = c generates the associated Laguerre polynomials of Askey and Wimp. We investigate the orthogonal polynomials in both cases and give alternate proofs of some of the results of Askey and Wimp on the associated Laguerre polynomials. We also identify the spectra of the associated Charlier and Meixner polynomials as zeros of certain transcendental equations.     

Distributive and Multiplication Modules and Rings

We study rings in which every ideal is a finitely generated multiplication right ideal.     

Beliefs and beyond: affect and the teaching and learning of mathematics

The importance of beliefs for the teaching and learning of mathematics is widely recognized among mathematics educators. In this special issue, we explicitly address what we call “beliefs and beyond” to indicate the larger field surrounding beliefs in mathematics education. This is done to broaden the discussion to related concepts (which may not originate in mathematics education) and to consider the interconnectedness of concepts. In particular, we present some new developments at the conceptual level, address different approaches to investigate beliefs, highlight the role of student beliefs in problem-solving activities, and discuss teacher beliefs and their significance for professional development. One specific intention is to consider expertise from colleagues in the fields of educational research and psychology, side by side with perspectives provided by researchers from mathematics education.