CEV模型的单位根检验研究

CEV模型（Constant Elasticity of Variance Model）作为常用的利率模型，在实证分析中得到了广泛运用，但是其单位根检验一直被忽略或者被默认可以使用迪基一富勒检验。本文首次运用Box—Cox变换的技巧，针对CEV模型的单位根检验问题，找到了合适的统计量并且证明其渐进分布存在，然后通过蒙特卡罗方法求出了该统计量的分布表。得到了在大样本的情形下可以沿用迪基一富勒检验，但在小样本的情形下与迪基一富勒检验有所偏差的结论。     

发展我国零售业态下的共同配送模式——日本7-11便利店物流革新的启示

日本7-11便利店在物流革新中开创了共同配送的新型配送模式,提高了配送效率,并成为其取得成功的关键因素之一.现阶段有三种典型的共同配送模式：集中配送模式、窗口批发模式、完全统一配送模式.鉴于我国零售业物流配送存在物流成本高、社会成本高、运输的规模不经济等问题,需要大力发展共同配送模式,以提高我国零售业物流配送效率.在我国零售业态下具体实行何种共同配送模式,可依据选择共同配送模式的决策参考模型,并结合具体情况做出决定.     

Hybrid governance and governance performance in industrial purchasing relationships

Hybrid governance arrangements (e.g. joint action, long-term contracting and vertical coordination) feature regularly as an effective response to inter-firm dependence in the literature of business-to-business relationships. However, current empirical work has paid little attention to whether such governance arrangements really do improve governance efficacy and reduce transaction costs. The present study focuses on the governance efficacy of vertical coordination in industrial business-to-business relationships. Building on transaction costs arguments, the author examines whether vertical coordination is an effective means for adapting to inter-firm dependence, realized as the substantial employment of specific assets.Empirical findings from a survey of 170 industrial supplier–buyer relationships demonstrate that when asset specificity reaches a certain level, greater vertical coordination reduces ex post transaction costs significantly. On the other hand, this efficacy pattern is modest or non-existent in relationships with low asset specificity.The research findings support the basic TCA assumption that the performance of hybrid governance arrangements is highly dependent on a situation of substantial inter-firm dependence with subsequent small-number conditions.     

Optimal pest control in agriculture

Based on economic methodology we model an ecosystem with two species in predator–prey relationship: mice feed on grain and grain feeds on a resource. With optimizing behavior of individual organisms a short-run ecosystem equilibrium is defined and characterized that depends on the farmer's use of fertilizer and pesticide and on the mice population which, in turn, is affected by pesticides. In that way, a microfounded agricultural production function is derived. Linking a sequence of short-run ecosystem equilibria yields the growth function of the mice population which is thus derived rather than assumed. In each period the farmer harvests all grain in excess of some given amount of seed. If she maximizes her present-value profits, optimal farming is characterized by either using no pesticide or a moderate amount of pesticide or by applying a chattering control. Pest eradication is never optimal. On the other hand, if the farmer takes into account steady-state mice populations only, it may be optimal to eradicate mice or to use no or a moderate amount of pesticide depending on prices as well as on the shape of the grain production function which is determined by microparameters of grain reproduction.     

长期筹资科学化的初步探索--构建最佳资本结构模型

助计算机用定量方法快速有效的解决长期筹资决策问题是知识经济时代对企业的必然要求。最佳资本结构模型用计算机运筹学的方法来决策不同筹资方式的最优筹资额，以帮助企业实现长期筹资目标同时也是财务管理最终目标——企业价值最大化。     

汇率波动率与中国对主要贸易伙伴的出口

本文研究汇率波动率对中国向三个主要贸易伙伴美国、欧盟和日本出口的影响。通过协整检验,误差修正模型和Granger非因果检验等方法估计变量间长短期的关系。研究表明,中国向美国和欧盟的实际出口与实际汇率波动率存在长期显著的负相关关系,而中国向日本的出口与汇率波动率无关。短期内汇率波动率只影响中国向美国的出口,对向欧盟和日本的出口没有影响。     

基于价值网络的中小企业战略与实施

随着个体竞争向群体竞争的转变,参与竞争的不再是单个企业的竞争,而是价值链、价值网络的整体抗衡.众多企业纷纷将价值链进行分解、重组,构建以自己为核心的价值网络,或将自己的核心能力模块化,融入更多的价值链.这为中小企业的发展提供了新的思路.中小企业应从价值网络竞争的高度,选择战略定位,构建自己价值网络或融入更多的价值网络,为此,需要重新定义业务、打造核心能力、加强价值网络的管理.     

实现国有企业出资者财务目标必须收取现金收益

随着我国国有资产管理体制改革的推进，各级政府逐渐成为国有企业的所有者权益的享受者。在现行体制下，政府作为国有企业股东应该采取何种手段实现出资者收益值得探讨。该文通过对国有投资收回方式的比较分析，指出现阶段各级政府股东对国有企业应通过收取现金收益的方式实现政府出资者收益，并说明实现该目标要注意的几个问题。     

中国遭受反倾销的现状分析及法律对策

中国加入世界贸易组织后，外国对我国出口产品的反倾销指控越演越烈，已经成为我国对外贸易发展的实质性障碍。其原因是多方面的，既有我国产业结构自身的原因，也有法规建设滞后、企业应诉消极等原因。我国应对国外反倾销指控的法律对策是应该在WTO法律框架下尽快完善《反倾销条例》和相关的部门法，健全反倾销应诉机制。     

成渝筑邕城市经济走廊共建面临的六大难题

"成渝筑邕城市经济走廊"战略构想的提出使西南地区"干"字形经济增长极(即"长江上游经济区 南贵昆经济带 成渝筑邕城市经济走廊"战略)雏形初现.成渝筑邕城市经济走廊共建面临着诸多难题,诸如城市结构失衡,产业分工水平低,城市边界边缘化,等等.对这些难题缺乏认识或估计不足将直接影响成渝筑邕城市经济走廊共建的效果,因此需要加以高度重视并努力找到求解之法.