赢得值管理在工程总承包项目中的应用

本文以工程总承包工程项目中的赢得值管理为研究对象,目前的工程项目对进度、造价控制提出了更高的要求,采用科学的赢得值管理,可以将项目的进度与成本有机地结合起来,对开展总承包项目具有一定的应用意义。     

The Myth of Fair Prices: A Graphical Analysis

The issues of fair trade and in particular fair price policies, have been neglected in most international trade courses. The authors show how the latter can be explained to undergraduate students applying the simple graphical methods normally used in general equilibrium trade theory. They show that fair pricing strategies can be looked upon as a suboptimal device for redistributing the gains from trade as compared with a transfer of funds.     

民国年间北京城庙市与城市市场结构

庙市是伴随寺观的宗教活动而形成的具有定期定性质的市场单元，在对中国城市市场空间结构，特别是历史时期上的市场空间结构的研究中，庙市有其不可忽视的地位，北京是中国具有悠久文化历史的古都，其庙市所形成的商业结构体系在城市的商业结构中占有重要的位置，本文通过对民国年间北京城庙市的时间和地域结构的分析，进而对其形成的商业结构进行分析。     

对《债务重组准则》实施中应注意的几个问题的探讨

从1999年1月1日至2000年12月31日，《企业会计准则－债务重组》在企业执行过程中，由于准则对债务重组业务会计处理规定上的某些缺陷，导致了某些企业尤其是某些上市公司利用此法律上的便利，随意调节度利润，粉饰财务报表，给国家在会计信息失真的治理工作方面制造了障碍，国家财政部审时度势，及时修订了《企业会计准则－债务重组》准则，克服了原准则的缺陷，进一步规范了企业债务重组务和会计核算办法，使中国的会计准则体系进一步得到了完善，但新准则的实施由于新经济情况的情况，难免有不妥当的表现，笔者从六个方面提出了应注意的和改进的问题，希望能与同仁进行商榷并在该准则实施和执行过程中引起关注，对该准则的有效实施产生一些进步的影响。     

Mark-Choose-Cut Algorithms For Fair And Strongly Fair Division

This paper proposes a new criterion to evaluate algorithms for cake division, by the number of resulting pieces. Then, inspired by the idea of "cut-and-choose", we present "mark-choose-cut" algorithms for fair and strongly fair cake division problems. They are game-theoretic algorithms. The number of resulting pieces is bounded by 2 × 3n-2 + 1 and 4 × 3n-2 + 1, for fair and strongly fair division respectively.     

A Benchmark Approach to Filtering in Finance

The paper proposes the use of the growth optimal portfolio for pricing and hedging in incomplete markets when there are unobserved factors that have to be filtered. The proposed filtering framework is applicable also in cases when there does not exist an equivalent risk neutral martingale measure. The reduction of the variance of derivative prices for increasing degrees of available information is measured. 1991 Mathematics Subject Classification: primary 90A09; secondary 60G99; 62P20 JEL Classification: G10, G13     

Understanding the Implied Volatility Surface for Options on a Diversified Index

This paper describes a two-factor model for a diversified index that attempts to explain both the leverage effect and the implied volatility skews that are characteristic of index options. Our formulation is based on an analysis of the growth optimal portfolio and a corresponding random market activity time where the discounted growth optimal portfolio is expressed as a time transformed squared Bessel process of dimension four. It turns out that for this index model an equivalent risk neutral martingale measure does not exist because the corresponding Radon-Nikodym derivative process is a strict local martingale. However, a consistent pricing and hedging framework is established by using the benchmark approach. The proposed model, which includes a random initial condition for market activity, generates implied volatility surfaces for European call and put options that are typically observed in real markets. The paper also examines the price differences of binary options for the proposed model and their Black-Scholes counterparts. Mathematics Subject Classification: primary 90A12; secondary 60G30; 62P20 JEL Classification: G10, G13     

资产公允价值的信息含量及其计量——来自香港金融类上市公司的经验数据

2006年我国颁布的新会计准则广泛引入了公允价值的概念。本文以香港金融类上市公司为样本，主要研究香港公允价值的实施是否增强了会计数据的解释能力。实证结果表明，无论是按公允价值计量的金融资产期末价值还是公允价值变动产生的朱实现收益，都对公司价格和市场收益率产生了显著的增量解释能力。实证结果同时显示，投资者对公允价值计量部分资产的关注程度也要普遍高于非公允价值计量的资产。研究结果能有效消除准则制定者的顾虑，推动公允价值更为广泛的运用。     

Modeling cascade dynamics of railway networks under inclement weather

Understanding the cascade dynamics of delay propagation under inclement weather is crucial to proactive railway management. In this paper, we proposed a Switching Max-Plus System (SMPS) to model the delay propagation on railway networks, which extends the conventional MPS by incorporating multiple system matrices to capture the dynamic impacts of inclement weather. An algorithm based on the All-Paired Critical-Path (APCP) graph was developed to solve the SMPS, which calculates secondary delays without backtracking the precedent events. The proposed model and its solution algorithm were validated using discrete-time simulations on both artificial and empirical networks. The robustness of railway services was also analyzed using the concepts of vulnerability and diffusivity.     

金融资产规模、公允价值会计 与管理层过度自信

本文以2004-2009年持有证券资产的A股上市公司为样本，对金融资产规模的决定因素进行了理论和实证研究，得到以下研究结论：（1）公允价值会计是上市公司金融资产规模显著增加的解释因素；（2）管理层过度自信在成本计量模式下与金融资产规模只有弱相关性，但在公允价值会计下却与金融资产规模显著正相关；（3）受政府控制的公司、大股东持股比例高的公司在成本计量模式下有显著更低的金融资产规模，但在公允价值会计下，特别是当管理层过度自信时，金融资产规模却呈现为显著增加。上述结论解释了会计理念、管理层行为与金融风险的内在关联性：公允价值计量模式遵循的是价值相关性原则，要求把证券持有利得也计入资产价值和会计收益，这个未来价值理念激励了公司管理层和控股股东的金融投资行为。