供应链视角下的多方并购框架

以并购参与方所在供应链为研究视角,探讨了买方与多个供应商并购分析框架。首先,得出多种框架下并购前后各方所获利润,并数值模拟供应链环境变化对买方利润的影响;其次,在比较基础上给出供应链各方互动下的均衡。结果表明,并购交易的实施和供应链各方互动共同影响并购各方和其余各方所获利润,且互动削弱了并购产生的正向协同效应。本文给出了供应链各方互动下的并购分析框架,进一步完善了并购决策过程中的交易评估内容。     

Finding an anti-risk path between two nodes in undirected graphs

Given a weighted graph G=(V,E) with a source s and a destination t, a traveler has to go from s to t. However, some of the edges may be blocked at certain times, and the traveler only observes that upon reaching an adjacent site of the blocked edge. Let ℘={P _G (s,t)} be the set of all paths from s to t. The risk of a path is defined as the longest travel under the assumption that any edge of the path may be blocked. The paper will propose the Anti-risk Path Problem of finding a path P _G (s,t) in ℘ such that it has minimum risk. We will show that this problem can be solved in O(mn+n ²log n) time suppose that at most one edge may be blocked, where n and m denote the number of vertices and edges in G, respectively. This research is supported by NSF of China under Grants 70525004, 60736027, 70121001 and Postdoctoral Science Foundation of China under Grant 20060401003.     

Improving the Numerical Performance of Static and Dynamic Aggregate Discrete Choice Random Coefficients Demand Estimation

The widely used estimator of Berry, Levinsohn, and Pakes (1995) produces estimates of consumer preferences from a discrete‐choice demand model with random coefficients, market‐level demand shocks, and endogenous prices. We derive numerical theory results characterizing the properties of the nested fixed point algorithm used to evaluate the objective function of BLP's estimator. We discuss problems with typical implementations, including cases that can lead to incorrect parameter estimates. As a solution, we recast estimation as a mathematical program with equilibrium constraints, which can be faster and which avoids the numerical issues associated with nested inner loops. The advantages are even more pronounced for forward‐looking demand models where the Bellman equation must also be solved repeatedly. Several Monte Carlo and real‐data experiments support our numerical concerns about the nested fixed point approach and the advantages of constrained optimization. For static BLP, the constrained optimization approach can be as much as ten to forty times faster for large‐dimensional problems with many markets.     

略谈“故宫学”研究的层次

"故宫学"作为一门新的、有形的学问和学科,其研究存在是由基础向尖端逐步推进的三个层次:一为专业史研究层次,内分专业通史研究和专业断代史研究二小层次,这是"故宫学"研究的基础层次。二为文物文献研究层次,注重学术史的梳理和档案史的清理,属于就文物说文物和就文献说文献,这是"故宫学"研究的主要层次。三为综合比较研究层次,强调不同时期和不同种类,属于就文物比文献和就文献较文物,这是"故宫学"研究的最高层次。     

试析山东现代教育发展的特点及启示

山东现代教育,最初是学习苏联教育经验,用政治批判和政治斗争方式解决学术和知识分子思想改造问题,确立党的领导和突出思想政治教育。创办半工半读教育制度,建立与计划经济相适应的教育体系;改革开放后,抢抓机遇,迅速确立了山东教育大省的地位,大力发展中、高等职业教育,有力地推进了山东由教育大癌向教育强省的迈进。以往的教育经验为今后山东教育的发展提供了有益的启示。     

提升河北省文化旅游产业核心竞争力的思考

新兴文化旅游业是河北省发展绿色经济,实现"绿色崛起"的重要途径。梳理了河北省内各地区文化旅游资源,在分析文化旅游产业发展的基础上,提出提升河北省文化旅游业竞争力要关注旅游者消费理念和方式的转变,有针对性地开拓市场;以现代营销理念宣传特色文化旅游品牌,建立消费者对旅游品牌的忠诚度;实施差异化战略,统筹发展,加强各行业和地区的联动;利用现代信息技术打造立体化旅游渠道,开发"情境旅游";发挥旅游地高校文化传播力和影响力的措施。     

钢 混凝土双面组合箱梁日照温度场研究

自然环境中的钢 混凝土双面组合箱梁受到日照作用影响,在梁体内部会产生温度应力。对某地的日气温变化及日照辐射量进行计算;利用有限元软件ANSYS进行仿真分析,计算双面组合箱梁截面在日照条件下的温度分布,对比分析正负弯矩区截面温度分布的异同,得到组合梁表面日温度变化规律;选取温差最大时的数值结果进行分析,用多项式拟合沿梁截面高度温度梯度分布。     

政治关联、企业绩效与企业行为的研究综述

自Krueger开创性地指出企业家花费时间和金钱与政府官员建立关系能给企业带来利益以来,企业与政治之间的关系一直是经济学家关注的热点问题之一。本文梳理了近年来关于政治关联(political connections)与企业价值之间的主要理论和实证文献。在实证文献综述中,从政治关联对企业价值与企业行为影响的这两个维度出发,按照文献的发展脉络和逻辑关系,阐述了这些文献的概念定义、度量方法、样本选择及主要结论。最后进行了总结并提出进一步研究的展望。