More pessimism than greediness: a characterization of monotone risk aversion in the rank-dependent expected utility model

Summary. This paper studies monotone risk aversion, the aversion to monotone, mean-preserving increase in risk (Quiggin [21]), in the Rank Dependent Expected Utility (RDEU) model. This model replaces expected utility by another functional, characterized by two functions, a utility function u in conjunction with a probability-perception function f. Monotone mean-preserving increases in risk are closely related to the notion of comparative dispersion introduced by Bickel and Lehmann [3,4] in Non-parametric Statistics. We present a characterization of the pairs (u,f) of monotone risk averse decision makers, based on an index of greediness G _u of the utility function u and an index of pessimism P _f of the probability perception function f: the decision maker is monotone risk averse if and only if . The index of greediness (non-concavity) of u is the supremum of taken over . The index of pessimism of f is the infimum of taken over 0 < v < 1. Thus, , with G _u = 1 iff u is concave. If then , i.e., f is majorized by the identity function. Since P _f = 1 for Expected Utility maximizers, forces u to be concave in this case; thus, the characterization of risk aversion as is a direct generalization from EU to RDEU. A novel element is that concavity of u is not necessary. In fact, u must be concave only if P _f = 1.Received: 10 April 2001, Revised: 18 November 2003, JEL Classification Numbers: D81. Correspondence to: Michéle CohenAlain Chateauneuf, Michéle Cohen, Isaac Meilijson: We are most grateful to Mark Machina, Peter Wakker and two anonymous referees for very helpful suggestions and comments.     

中国钢铁业：结构、行为和绩效分析

国际环境快速变化,国内钢铁业如火如荼,认清中国钢铁行业的现状,通过产业组织理论的市场结构、市场行为和市场绩效的分析方法对钢铁全行业进行分析,提出改善钢铁行业结构,建立金融规避风险机制,促进产业前向整合之对策。     

供应链环境下库存管理绩效评价研究

针对目前供应链库存管理绩效评价不足的现状,根据供应链库存管理的特点与特殊性,提出了供应链库存管理绩效评价原则,建立了相应的绩效评价指标体系,运用AHP法确定各项指标相应权重,建立了供应链环境下的库存控制绩效模糊综合评判模型,并进行了算例应用。     

成本管理绩效评价体系的构建与研究——分层次双渠道综合确定关键绩效指标

成本管理理论的发展和平衡计分卡作为绩效评价和战略管理工具在实践中的逐步完善,推动了成本管理绩效评价的研究。本文提出一种新的业绩评价思路:在成本管理的战略层,使用平衡计分卡寻求成本管理的成功因素(CSF);而在成本管理的作业层,从管理决策导向因素出发确定业绩评价指标,进而综合确定关键绩效指标(KPI)。     

国外并购绩效评价方法研究综述

20世纪全球经历了5次企业并购浪潮,并购已经成为现代企业尤其是大型企业和高成长企业快速扩张和整合的重要手段之一.企业并购的之后的效果如何,如何来评价并购的绩效,国外学者从不同角度做了大量的研究,但数十年的研究至今没有一个统一的结论.本文总结了30多年以来国外学者有关企业并购绩效研究的重要文献,在此基础上将国外并购绩效的评价方法分为财务评价、股票评价和其他评价三类,并指出了并购绩效评价方法中存在的问题.     

中国货币政策传导机制分析——利率渠道的实证分析

市场经济条件下，在发达的货币市场和有效的金融机制基础上，货币政策主要通过利率、汇率、非货币资产和信贷传播四条途径影响宏观经济总量。本文重点通过对利率传导渠道的实证分析，说明中国由于利率管制等方面对货币政策传导的阻滞作用，中央银行的货币政策意图不能有效地指导实体经济，进而对疏导货币政策的传导机制提出对策建议。     

Diversification, convex preferences and non-empty core in the Choquet expected utility model

Summary. We show, in the Choquet expected utility model, that preference for diversification, that is, convex preferences, is equivalent to a concave utility index and a convex capacity. We then introduce a weaker notion of diversification, namely “sure diversification.” We show that this implies that the core of the capacity is non-empty. The converse holds under concavity of the utility index, which is itself equivalent to the notion of comonotone diversification, that we introduce. In an Anscombe-Aumann setting, preference for diversification is equivalent to convexity of the capacity and preference for sure diversification is equivalent to non-empty core. In the expected utility model, all these notions of diversification are equivalent and are represented by the concavity of the utility index. Received: July 27, 1999; revised version: November 7, 2000     

浙江省水利投融资的分析

在剖析了浙江省近年水利资金投向结构及水利建设资金来源构成的基础上，对浙江水利资金投向结构发生变化的原因以及浙江水利融资的特点进行了分析研究，提出了今后稳定水利投资规模的对策和建议。     

医药电子市场的绩效与运作研究

我国自实施药品招标采购电子平台以来，电子商务在医疗行业中的运用逐渐普及．但也因此产生了很多争议。本文通过对我国电子市场和药品生产、经销企业的调研．分析了我国药品电子市场的运行和绩效．从中发现和解释我国医疗电子供应链的特质．以及电子市场发展的未来走向。     

绩效评估系统模式研究：组织公正视角

绩效评估中应该考虑的公正类型有四种：系统程序公正、评价者程序公正、互动公正和分配公正。典型的绩效评估系统包括系统方案设计、绩效计划制定、绩效沟通和辅导、绩效评价、绩效反馈面谈和评估结果运用。公正接触点发生在绩效评估的系统设计和流程的所有阶段，代表了员工对绩效评估系统中各要素的期望。本文结合绩效评估中的公正类型、评估流程以及公正接触点的概念构建了公正绩效评估系统模式。