Mean-variance hedging for interest rate models¶with stochastic volatility

The mean-variance hedging approach for pricing and hedging claims in incomplete markets was originally introduced for risky assets. The aim of this paper is to apply this approach to interest rate models in the presence of stochastic volatility, seen as a consequence of incomplete information. We fix a finite number of bonds such that the volatility matrix is invertible and provide an explicit formula for the density of the variance-optimal measure which is independent of the chosen times of maturity. Finally, we compute the mean-variance hedging strategy for a caplet and compare it with the optimal stategy according to the local risk minimizing approach. Received: 14 July 2000 / Accepted: 10 April 2001     

用期权定价模型评估企业并购的价值

针对传统企业并购价值评估模型的局限性,本文从期权的角度阐述了企业并购的期权特性,指出企业并购实质上相当于取得了一个看涨期权;并以连续支付红利的美式期权定价理论为基础,建立了企业并购价值评估的期权定价模型。最后,通过实例论述了如何应用该模型来评估企业并购价值,对实践中企业并购价值的合理确定具有重要的指导意义。     

Corporate Restructuring in Japan Part I: Can M‐Form Organization Manage Diverse Businesses?

The purpose of this paper is to examine the recent organizational restructuring in Japan in the framework of organizational economics, assuming that the product/market portfolio of the firm is fixed. How does a firm set about organizing its internal divisions? I first summarize some stylized facts on corporate diversification strategy and multi‐divisional (M‐form) organization in large Japanese firms from different perspectives. I then analyse the problem of choosing an organizational form. In particular, I argue that, precisely because of its related diversification, the multi‐business Japanese firm adopting the M‐form finds it difficult to differentiate its diverse businesses internally.     

Public choice interpretations of distributional preference

This essay examines, from the perspective of both economics and ethics, the logical foundations of income transfers in a democratic society that allocates resources, in the large, through free markets. Such transfers, enacted through the public choice process, modify the market-determined distribution of income, as a reflection of the distributional preferences of the members of a society. Both constitutional and post-constitutional explanations of redistributions are considered. A discussion of recent experimental evidence of distributional preferences leads into a critique of simple equality, built on Michael Walzer's distinction between monopoly and dominance, as a criterion of distributive justice.     

Effective property rights, conflict and growth

This paper shows how the interaction between conflict and growth can give rise to a nonmonotone relationship between property rights and social welfare. This interaction is illustrated in a model of endogenous growth in which equilibrium diversion of resources is the cost of securing effective property rights. A symmetric equilibrium allocation associated with more secure property rights and faster growth can be Pareto dominated by one associated with poorer property rights and slower growth. Faster growth can exacerbate the problem of diversion whenever property rights are sufficiently poor. These results call for caution before a society decides to pursue economic growth independently of the institutional structure of property rights. Furthermore, if this structure is inappropriate piecemeal reform might not be in the interest of society, and a substantial reform might be necessary if it is to be welfare-improving.     

一类企业物流成本核算的M-A模型

本文在分析和比较任务成本(Mission Costing)与作业成本(Activity-Based Costing)的前提下,将任务成本与作业成本结合起来构建了企业物流成本核算的M-A模型框架.在这个模型框架内,系统地阐述了企业物流成本核算的涵括范围、数据收集来源以及相关物流成本的分配架构等.     

1998年中国上市公司并购实践的效应分析

对上市公司的收购是中国股市近些年出现的新现象 ,本文以 1 998年深沪两市发生的全部 67家公司的并购为样本 ,以公司净资产收益率 (NROA)和主业利润率(CROA)为指标 ,将所有样本根据并购原因划分为 6类 ,以并购前 2年和并购后 3年的数据为基础 ,系统分析了并购的效应与得失。在此基础上 ,还讨论了国有企业与民营企业作为收购方的并购效应和并购的有偿转让与无偿划拨方式的不同结果。文章的结论是 :业绩较差的公司较愿出让控股权 ;多数并购是战略性的 ,获上市地位是主要的并购动力 ;并购后主业得到明显加强 ;市场化的战略性并购效果较好 ,有偿并购的效果也较好。     

从"10+3"看东亚区域经济合作的方式

东亚区域合作面临许多难题，贯穿“东盟方式”的“10 3”合作是东亚目前的主导形式，但这一合作的诸多缺憾使东亚区域合作很难沿这一方向深入下去。2002年初，小泉纯一郎在新加坡描述了一个称为“东亚共同体”的设想，实际是鼓吹以双边自由贸易协定网而非区域经济一体化的方式来实现东亚的区域合作。的确，双边自由贸易协定网的方式不但符合东盟强调自立的合作原则，也迎合了外部特别是美国在这一地区的利益，易为各方接受，却从根本上堵住了东亚通往更具机制化合作的道路。笔者认为东亚区域合作的必然选择是大国协调为基础的区域经济一体化，这虽然需要一个艰难的调整过程，但却是在全球化条件下保障东亚各国利益的惟一选择。     

一种新型的合成红宝石杜罗斯（Douros）合成红宝石

本文介绍了希腊用助熔剂法生产的，一种称之为杜罗斯（Ｄｏｕｒｏｓ）的合成红宝石新品种。     

王国维:"一代有一代之文学"说的集大成者

“一代有一代之文学”说是一个在世代累积基础上建构的学术命题。这一命题植根于中国传统的文变时序说和文体通变论，并由于王国雏的理论贡献而基本定型．成为中国文学史研究中最重要的学术命题，深刻地影响了20世纪文学史研究的格局与走向。