股票投资价值的灰色多层次评价

股票投资价值的评估是一个多目标、多层次和多因素组成的复杂系统,对其进行综合评价对投资决策是至关重要的。本文根据灰色系统理论,以灰色关联度为测度,提出了股票投资价值的灰色多层次评价模型,并通过实证研究和理论分析,表明该模型对投资者的决策有较高的参考价值。     

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。     

物流客户服务水平的模糊评价方法

提出了一套评价物流客户服务水平的较为系统、完整的指标体系，在此基础上结合模糊数学的思想给出了物流客户服务水平的模糊评价方法，该方法有利于定性指标的定量化，实际算例验证了这一方法的易操作性和有效性。     

Nonpoint Source Pollution Taxes and Excessive Tax Burden

If a regulator is unable to measure firms’ individual emissions, an ambient tax can be used to achieve the socially desired level of pollution. With this tax, each firm pays a unit tax on aggregate emissions. In order for the tax to be effective, firms must recognize that their decisions affect aggregate emissions. When firms behave strategically with respect to the tax-setting regulator, under plausible circumstances their tax burden is lower under an ambient tax, relative to the tax which charges firms on the basis of individual emissions. Firms may prefer the case where the regulator is unable to observe individual firm emissions, even if this asymmetric information causes the regulator to tax each firm on the basis of aggregate emissions.     

基础设施在中国农业全要素生产率中的作用

This paper uses the Malmquist index to examine the sources of Total Factor Productivity (TFP) in Chinese agriculture. The overall goal of this study is to create a framework for assessing the trend of China’s agricultural infrastructure and to measure its impact on Total Factor Productivity. The main methodological contribution is to provide more contributive measure of crop-specific technologies. Based on the province-level panel data set during 1988–2002, the primary finding is that infrastructure has positively and statistically significant association with the estimated coefficient on Total Factor Productivity for rice, wheat, maize, and bean. An erratum to this article is available at .     

内部控制与企业价值研究——来自沪深两市A股的经验分析

为了研究内部控制与企业价值的相关关系,文章构建了中国上市公司内部控制综合评价指数(ICI),基本涵盖了COSO框架下的控制环境、风险评估、控制手段、信息与沟通及监督五个主要方面。通过运用实际数据进行实证研究,发现我国上市公司的内部控制的建立和完善确实对企业价值有高度显著的正向促进作用,并随着改革的深入和证券市场的规范化,呈现出逐年强化的趋势。     

环境库兹涅茨曲线假说及其在中国的检验

经济与环境协调发展是我国经济发展中的重大课题。本文从环境库兹涅茨曲线假说出发,利用中国各个省市区1989～2004年数据建立面板数据模型,运用固定效应模型和随机效应模型对其进行估计,以此剖析我国经济增长与环境污染水平的演变规律。结果表明,环境库兹涅茨曲线假说在我国并不成立。因此,我国不能盲目重复发达国家"先污染,后治理"的传统模式,而应该走环境与经济持续协调发展的道路。     

家族企业的危机管理及危机预警系统的构建

家族企业危机主要包括外部环境变化带来的危机和由内部因素带来的危机两大类型。家族企业危机管理对家族企业的生存与发展具有极其重要的意义。家族企业危机预警系统具体由危机监测系统、危机识别系统、危机诊断系统、危机评价系统和危机预处理系统五个子系统构成。家族企业危机预警评价指标体系的设计与警度预报是家族企业危机预警系统构建中的一项重要内容。     

The Optimal Timing of Adoption of a Green Technology

We study the optimal timing of adoption of a cleaner technology and its effects on the rate of growth of an economy in the context of an AK endogenous growth model. We show that the results depend upon the behavior of the marginal utility of environmental quality with respect to consumption. When it is increasing, we derive the capital level at the optimal timing of adoption. We show that this capital threshold is independent of the initial conditions on the stock of capital, implying that capital-poor countries tend to take longer to adopt. Also, country-specific characteristics, as the existence of high barriers to adoption, may lead to different capital thresholds for different countries. If the marginal utility of environmental quality decreases with consumption, a country should never delay adoption; the optimal policy is either to adopt immediately or, if adoption costs are “too high”, to never adopt. The policy implications of these results are discussed in the context of the international debate surrounding the environmental political agenda.      

Managing the international commons: Resource use and pollution control

The simultaneous management, in an international context, of free-access renewable resources and transboundary pollution, is examined in a dynamic game framework. First-best outcomes under international cooperation are determined and compared to noncooperative outcomes when countries follow linear Markov strategies. An international policy consisting of taxes on emissions and harvesting, with international redistribution of tax receipts, is used to achieve the cooperative solution. In addition, side payments may be required to prevent free riding and thus make the international policy implementable.Earlier versions of this paper were presented at the International WorkshopEconomic Aspects of International Water Resources Utilization in the Mediterranean Basin, Fondazione ENI Enrico Mattei, Milan, October 1993, and the Fifth Annual Conference of EAERE, Dublin, June 1994. I would like to thank Peter Berck, Charles Kolstad, Mordechai Schechter, and two anonymous referees for their valuable comments.