On strategy-proofness and essentially single-valued cores: A converse result

In a general model of indivisible good allocation, S?nmez (1999) established that, whenever the core is nonempty for each preference profile, if an allocation rule is strategy-proof, individually rational and Pareto optimal, then the rule is a selection from the core correspondence, and the core correspondence must be essentially single-valued. This paper studies the converse claim of this result. I demonstrate that whenever the preference domain satisfies a certain condition of `richness', if the core correspondence is essentially single-valued, then any selection from the core correspondence is strategy-proof (even weakly coalition strategy-proof, in fact). In particular, on the domain of preferences in which each individual has strict preferences over his own assignments and there is no consumption externality, such an allocation rule is coalition strategy-proof. And on this domain, coalition strategy-proofness is equivalent to Maskin monotonicity, an important property in implementation theory. Received: 22 February 2000/Accepted: 22 January 2002 I am grateful to Ryo-ichi Nagahisa, Shinji Ohseto, Hiroshi Ono, Tomoichi Shinotsuka and Shigehiro Serizawa for valuable comments. And I am indebted to two anonymous referees for useful suggestions. Especially, I owe the present proof of Lemma 2 to one referee. I also thank Yukihiko Funaki, Atsushi Kajii, Mamoru Kaneko, Eiichi Miyagawa, Tatsuyoshi Saijo, Manimay Sengupta, Yves Sprumont, Yoshikatsu Tatamitani, Manabu Toda, Takashi Ui, Takehiko Yamato, Naoki Yoshihara and the participants of the seminars in Hokkaido University, Kansai University, ISER (Osaka University), Otaru University of Commerce and Tsukuba University. All errors are my own responsiblity.     

The dilemma of recognition: Administrative categories and cultural diversity

Governments around the world combat inequality by means of group-specific redistribution. Some pursue redistribution that benefits groups, but also wish to avoid accentuating or even recognizing group distinctions. This poses a dilemma that they try to resolve by adjusting the category system used to target redistribution. There are three types of adjustment: accommodation (the multicultural approach), denial (the ideal-typical liberal solution), and replacement (a compromise). In replacement the targets of redistributive policies are constructed to avoid accentuation or recognition of inconvenient group distinctions, but still allow redistribution that benefits these groups. Replacement is increasingly in demand around the world because the disadvantages of multiculturalism are becoming apparent while denial is hard to sustain in the face of group inequality. The actual effect of replacement is little researched and less understood, however. Does it resolve the dilemma of recognition? Two examples–India and Nigeria–where replacement has been tried ever since the 1950s cast doubt on its viability.     

"服务行政":从概念到模式 --考察当代中国"服务行政"理论的源头

在中国,“服务行政”意味着一场现实的运动,它既是当前理论探讨的热点问题,也是政府改革实践中的主题和议程。考察服务行政这个概念,从1995到1997年,处于形成阶段;在1998到2 0 0 0年,则是模式建构的理论思索阶段。在“服务行政”理论形成的这一阶段中,从概念的提出到模式的建构,不仅是中国行政学史上极有学术价值的事件,而且启示了中国服务型政府建设的历史进程。     

浅谈国有企业改革中存在的问题及对策

对国有企业改革中存在的问题进行了分析 ,并提出国有企业改革是目前我国经济工作的重点 ,应结合国有资本退出采取股份制改造等方式 ,通过建立健全配套法规 ,建立现代企业制度 ,引入独立董事 ,完善经营者的激励约束机制 ,把国有企业改造成为能够适应社会主义市场经济的企业法人。     

创新素质培养与课外创新活动

创新已经成为当今时代的标志和潮流 ,高校作为国家知识创新和技术创新体系的基础 ,加强对大学生的创新素质培养 ,是当前高校的战略任务和重要使命。从创新意识、创新思维、创新技能和创新人格四个方面阐述了创新素质培养的内涵 ,认为课外创新活动是创新素质培养的重要补充 ;同时提出了课外创新活动的模式 ,突出了创新意识、创新实践和创新成果之间的良性循环 ,构建了大学生课外创新活动的支撑体系。     

数学教学中渗透创造性思维训练的尝试

通过对联想思维、求异思维、逆向思维、求通求变思维训练的分析,阐述了培养创造性思维的具体方法.     

分振幅薄膜干涉课件的制作

利用电脑对点光源和发光平面的薄膜干涉进行模拟 ,并将其制作成多媒体课件 ,使看上去很复杂的光路图变得简单、清晰 ,使教学具有良好的视觉效果 ,大大增强了课堂的容量     

R＆D经费投入的国际比较与借鉴

R&D经费投入是评价国家科技实力和科技发展水平的首选指标 ,长期以来已为世界各国和重要国际组织所普遍采用。本文主要针对我国R&D经费投入与国际间的比较 ,分析我国R&D投入所处的阶段及R&D投入方面存在的差距与困难 ,最后提出对策与建议