一个实物期权例子求解方法的辨析

对注会教材《财务成本管理》关于时机选择期权例子中计算报酬率方法的错误进行了讨论,指出了应该采用的正确方法,并对该例进行了重新计算与分析。     

Prioritising land to be preserved for agriculture: A context-specific value tree

In Belgium as in many other countries, agricultural land is under pressure for development of other land uses. This paper presents a method for setting priorities for preservation of land for agriculture. The method is based on a participatory approach through which a value tree is formulated. This results in a list of criteria to define farmland value, which is explicitly linked to the objectives for farmland preservation. The value tree allows the list of criteria to be determined in a structured and consistent way. The participatory process contributes to the development of a shared vision on farmland preservation. The approach also incorporates context specificity, as shown by its application for farmland preservation in Flanders.     

MULTIDIMENSIONAL DISTANCE‐TO‐COLLAPSE POINT AND SOVEREIGN DEFAULT PREDICTION

By focusing on sovereign defaults, this paper introduces a multidimensional distance‐to‐collapse point based on a two‐step procedure. The first step is nonparametric and provides an early warning system that signals a potential crisis whenever preselected leading indicators exceed specific thresholds. The second is parametric and incorporates the first‐step country default predictors within a probit specification. Such a two‐step procedure generalizes the distance‐to‐default à la Merton within a multidimensional setting, wherein we care about the distance of each indicator from its threshold. Empirical evidence about debt crises of emerging markets over the period 1975–2002 proves that our methodology predicts 80% of the total defaults and non‐defaults in and out of sample. Copyright © 2012 John Wiley & Sons, Ltd.     

Coloured Logic Petri Nets and analysis of their reachable trees

Logic Petri nets (LPNs) can describe and analyse the batch processing function and passing value indeterminacy in cooperative systems, and alleviate the state space explosion problem. However, the indeterminate data of logical output transitions cannot be described explicitly in LPNs. Therefore, Coloured Logic Petri nets (CLPNs) are defined in this paper. It can determine the indeterminate data of logic output transitions in LPNs, i.e., the indeterminate data can be represented definitely in CLPNs. A vector matching method is proposed to judge the enabling transitions and analyse CLPNs. From the marking equation and the proposed reachable tree generation algorithm of CLPNs, a reachable tree can be built, and reachable markings are calculated. The advantage of CLPNs can be shown based on the number of leaf nodes of the reachability tree, and CLPNs can solve the indeterminate data of logical output transitions. Finally, an example shows that CLPNs can further reduce the dimensionality of reachable markings.     

Democracy and Growth: Alternative Approaches

This article focuses on two previously unexamined aspects of the relationship between economic growth and democracy. First, the growth experiences of countries that experience significant changes in democracy are examined directly. Countries that democratize are found to grow faster than a priori similar countries, while countries that become less democratic grow more slowly than comparable countries. These differences do not seem to be due to differences in education or investment levels. Second, regression tree analysis suggests that democracy, along with initial income and literacy, contributes to the identification of regimes of countries facing similar aggregate production functions.     

FTA分析法在建筑工程施工风险分析中的应用研究

概率预测是评估建筑工程事故风险的基本手段,基于对建筑工程风险因素的综合分析,确定了建筑工程风险源因素FTA(Fault Tree Analysis)分析方法,目的在于为建筑工程概率预测方法的研究提供一种新的尝试,故为采取合理的防治技术措施在理论上、方法上提供有益的指导,并最终减少和控制建筑工程事故的发生.     

LDPC码的树图法构造

LDPC码译码采用的是BP算法,但由于回路的存在,使译码重复迭代,特别是短长度的回路使LDPC码的性能下降.为此,用树图法分析了LDPC码的回路及其特性,给出了求解回路长度和所经过节点的方法,非常适合于计算机进行求解.同时也用树图的方法来构造LDPC码,可以在树生成的过程中了解其中的回路数目及长度.     

论企业内部人力资源管理的有效性

企业中的“人”将决定企业能否最终取得市场或战略上的成功。在诸多的论著中经常会看到“员工是上帝”这种说法,那么企业的员工又处于什么样的位置呢?从一个较新的视角——“顾问咨询与市场交流”这个角度来探讨企业内部人力资源管理中“员工”问题,并尝试着如何从战略的高度解决或者说提升企业内部人力资源管理方面的有效性问题。     

一个与供应链协同的虚拟价值网集成增值矩阵

运用集成原理及系统方法论探讨了虚拟价值网集成的结构机理,从集成意义上构造了一个与供应链协同的增值矩阵,即基于信息共享、知识共享、价值共享的三个平台,虚拟实现与工作流、知识流、价值流协同的供应链上的信息流、财务流和物流增值。同时作出虚拟价值网集成管理的优化树图,为现行供应链管理模式的优化升级提供模拟支持和方法选择。