电子商务环境下物流配送中心选址决策与评价方法研究

电子商务环境下的物流配送中心选址涉及到多方面的因素,是一项复杂的系统工程。为此,提出了定量化的启发式算法来初步确定电子商务环境下配送中心选址方案。方案的确定是为了决策,因此依据定量计算和定性分析的结果,采用协调分析方法来科学地决策符合电子商务环境下的最优选址方案。     

EXISTENCE OF A NONNEGATIVE EQUILIBRIUM PRICE VECTOR IN THE MEAN-VARIANCE CAPITAL MARKET

We derive a necessary and sufficient condition for the existence of a nonnegative equilibrium price vector under which the total demand and supply of each asset balances in the standard mean-variance capital market. Also, we give an explicit formula for such a price vector. This formula shows that the price of assets is an increasing function of , the weighted average of the requested rate of return of individual investors, which tends to infinity as approaches the expected rate of return on the market portfolio. Further, we construct a macroeconomic index which gives information about the soundness of the capital market.     

外币报表折算中的现行汇率法和时态法

为了全面综合反映跨国公司整体的财务状况和经营成果，每届会计期末，公司都要编制整个跨国公司的合并财务报表。而在报表合并中应如何进行外币报表折算仍是国际会计争论的热点问题。     

浅谈企业信用评级方法

本文在阐述信用评级作用的基础上,基于对信用评级的科学性、准确性考虑,对企业信用评级方法进行评价,总结各方法的优缺点,并得出自己的观点。     

我国上市公司财务困境预测模型分析——基于我国A股上市公司研究

基于我国A股市场上市的ST公司和相对应的非ST公司,用Logistic回归的进入法和逐步法对上市公司财务困境预测模型进行了比较分析,得出结论:无论是模型的有效性,还是模型的判断准确率方面,Logistic回归的进入法均优于逐步法。     

一体化经营企业的转移定价实证分析

为使企业总体利益最大化,在企业两个或数个不同的分部之间确定适当的价格和产量对一体化经营企业而言极为重要。同时,转移定价可作为一种分部之间的激励机制。采用边际成本等于边际收益的方法,可以得到不同的市场结构中最优的转移价格和产量。     

HIGH‐ORDER SHORT‐TIME EXPANSIONS FOR ATM OPTION PRICES OF EXPONENTIAL LÉVY MODELS

The short‐time asymptotic behavior of option prices for a variety of models with jumps has received much attention in recent years. In this work, a novel second‐order approximation for at‐the‐money (ATM) option prices is derived for a large class of exponential Lévy models with or without Brownian component. The results hereafter shed new light on the connection between both the volatility of the continuous component and the jump parameters and the behavior of ATM option prices near expiration. In the presence of a Brownian component, the second‐order term, in time‐t, is of the form , with d₂ only depending on Y, the degree of jump activity, on σ, the volatility of the continuous component, and on an additional parameter controlling the intensity of the “small” jumps (regardless of their signs). This extends the well‐known result that the leading first‐order term is . In contrast, under a pure‐jump model, the dependence on Y and on the separate intensities of negative and positive small jumps are already reflected in the leading term, which is of the form . The second‐order term is shown to be of the form and, therefore, its order of decay turns out to be independent of Y. The asymptotic behavior of the corresponding Black–Scholes implied volatilities is also addressed. Our method of proof is based on an integral representation of the option price involving the tail probability of the log‐return process under the share measure and a suitable change of probability measure under which the pure‐jump component of the log‐return process becomes a Y‐stable process. Our approach is sufficiently general to cover a wide class of Lévy processes, which satisfy the latter property and whose Lévy density can be closely approximated by a stable density near the origin. Our numerical results show that the first‐order term typically exhibits rather poor performance and that the second‐order term can significantly improve the approximation's accuracy, particularly in the absence of a Brownian component.     

基于数据包络分析法的绩效评估技术研究——来自军工上市公司的实证分析

本文认为,一种行之有效的绩效评估方法是开展高质量绩效审计的重要前提,而数据包络分析法(简称DEA方法)可以为绩效评估提供很好的定量分析工具。数据包络分析法属于非参数方法,无需事先假设函数关系,其评估不受人为因素影响,多用于对多投入和多产出的不同决策单元的效率进行评估。固定规模报酬下的多投入、多产出的效率评估模型(C2R模型)就是以数据包络分析法为思想基础的一个著名模型。文章以军工板块航天系9家上市公司为决策单元,利用C2R模型进行了运营效率评估,并通过对C2R模型计算结果进行效率分析、投影值分析及敏感度分析,构建了基于数据包络分析法的组织绩效评估技术框架。     

信息产品营销机理探析

随着计算机和网络技术的飞速发展，由此形成的产品──信息产品将以前所未有的速度席卷全球。信息产品在流通过程中也形成了自身独有的行为特征，致使产品市场结构与传统比较出现新的转向。为此，有必要对其展开分析研究，这对制定合理科学的定价尤为重要。     

Critical Situations for Decision Making: A Support Based on a Modelling Tool

This paper proposes to give a toll to help decision makers in critical situations. The principle of our research is based on a modelling approach for Cooperative Knowledge Based Systems. This approach is based on a Task/Method paradigm that we describe. We then propose to take into account collateral effects of tasks in order to support decision makers in a critical context. The proposed tool can then generate a degraded solution for which, collateral effects of previous tasks have been taken as new goals to reach. This study is possible thanks to the definition of several kinds of models: a Good Functioning Model and a Degraded Tasks Library.