Domestic and international strategic interactions in environment policy formation

Summary. In this paper, we establish the most possilbe general formulation of the technology governing carbon-gas emission, giving rise to global external diseconomies, and ty to explore into the strategic interactions,both domestic and international, when an individual country decides on the environmental policies. Through the comparison among emission taxes, quotas, and standard in the perfectly competitive private economies, we find that the first two policies are equivalent but they are different in effects by virtue of what we may call the tax-exemption effect of emission standards. Such a difference in the policy effect further affects the other country's welfare through the global externalities, amplified through whether the government can precommit to either the emission tax or the emission standard. Received: January 16, 2001; revised version: April 16, 2002 RID="*" ID="*" The authors thank the valuable comments by an anonymous referee. Ministry of Education and Science for its financial support is also greatly acknowledged. Correspondence to:K. Kiyono     

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     

培养青年人才提升国有企业竞争力

加入WTO以后，要提高国有企业的竞争力，必须注意培养青年人才，建立健全人才的培养和激励机制，强化青年人才资源的开发利用，各级政府要为国有企业青年人才资源的开发和利用创造良好的条件。     

论人力资本理念下的现代企业会计理论模块与观念构架

运用传统会计知识和经验、兼容演绎法和归纳法对人力资本理念下的现代企业会计进行创新思考,先演绎成包括会计假设、会计确认、会计计量、会计账户、会计记录、会计报告六个一体化的理论方面,后归纳为包涵传统会计、人力资源会计两个立体化的观念层次,形成了人力资本理念下的现代企业会计理论模块与观念构架。     

物流运输路线选择与成本节约

目前城市物流运输要解决的迫切问题是如何在日益拥挤的城市交通条件下提高运营效率,降低由于交通拥挤给企业带来的运输成本增加。本文通过对传统的运输路线选择模型和算法的分析,提出了根据路网实时动态交通条件进行运输路线选择的模型,并对动态运输路线选择的成本节约进行了分析。     

既有结构可靠度的模糊算法

基于结构抗力和荷载效应的不确定性，提出了一种既有结构工程可靠度的模糊算法。该方法利用模糊算法可以反映客观事物因素的层次性，又便于比较和考虑各层次中诸因素作用的大小以决定可靠度。算例结果表明该方法简单实用，其模型可以很好地拟合真实的极限状态函数，是解决既有结构体系可靠度问题的有效方法。     

当前我国城市社群隔离产生的原因、危害及对策

中国改革开放后 ,一大批农民离开自己的土地和家园来到城市。农民工群体与市民群体成为当前我国城市中两大主要群体。他们之间的关系对整个社会整合与稳定有着十分重要的作用。本文分析了两大群体间产生隔离现象的原因 ,危害及其对策     

Capacity constrained firms in (labor) markets with adverse selection

Summary. We discuss a competitive (labor) market where firms face capacity constraints and individuals differ according to their productivity. Firms offer two-dimensional contracts like wage and task level. Then workers choose firms and contracts. Workers might be rationed if the number of applicants exceeds the capacity of the firm. We show that under reasonable assumptions on the distribution of capacity an equilibrium in pure strategies (by the firms) exists. This result stands in contrast to the case of unlimited capacity. The utility level is uniquely determined in equilibrium. No rationing occurs in equilibrium, but it does off the equilibrium path. Received: December 29, 1999; revised version: November 30, 2000     

Vertical Integration and Market Foreclosure with Convex Downstream Costs

Received December 14, 2000; revised version received July 16, 2001     

Revisiting Savage in a conditional world

Summary. I present an axiomatization of subjective expected utility and Bayesian updating in a conditional decision problem. This result improves our understanding of the Bayesian standard from two perspectives: 1) it uses a set of axioms which are weak and intuitive; 2) it provides a formal proof to results on the relation between dynamic consistency, expected utility and Bayesian updating which have never been explicitly proved in a fully subjective framework. Received: December 1, 2000; revised version: February 26, 2001