Flipping and ex post aggregation

We show that Bayesian ex post aggregation is unstable with respect to refinements. Suppose a group of Bayesians use ex post aggregation. Since it is a joint problem, each agent's problem is captured by the same model, but probabilities and utilities may vary. If they analyze the same situation in more detail, their refined analysis should preserve their preferences among acts. However, ex post aggregation could bring about a preference reversal on the group level. Ex post aggregation thus depends on how much information is used and may keep oscillating (“flipping”) as one keeps adding more information. Received: 16 April 2002/Accepted: 27 May 2002     

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.     

低温外科手术器械的现状和展望

本文从工程应用角度出发,综述了目前使用的各种低温外科手术器械的性能特点和适用场合。以当前使用最普遍的LN_2式冷疗仪为例对其原理、结构作了简要说明,着重指出其制造的关键和存在的不足,并对冷疗仪的进一步发展作了展望。     

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.     

西部信息化与发展信息产业的战略思考

信息技术已成为当今世界经济与社会发展的主要驱动力 ,信息产业也已经成为新世纪具有强劲发展实力的经济增长点。西部地区这实施大开发战略 ,实现超越式发展目标 ,加快现代化建设步伐 ,提高国民经济发展的质量与素质 ,必须重视信息化推进和信息产业发展。但西部推进信息化和发展信息产业的基础条件较差 ,发展速度亟待进一步加快 ,发展层次亟待进一步提升 ,因此 ,必须要有超常规的强有力措施 ,需要作为“一号工程”来实施     

民族地区以信息化带动工业化发展的对策研究

只有加速推进信息化带动工业化的进程 ,西部民族地区才能发挥“后发”优势 ,实现跨越式发展。为此 ,西部民族地区需加快和优先发展信息产业、积极推进信息技术在传统工业领域的广泛应用。坚持走以市场为主导的道路、加大对信息产业的投入、制定相应的人才政策 ,并注重培育和优化与信息化推进和信息化产业发展相关的外部环境。     

中西文化差异在翻译中的特殊作用

在翻译中常遇到的难题是中西文化差异。本文从物质文化、社会文化和思想文化三个层面对中西文化差异进行了探讨 ,同时进一步剖析了这种反映在语言层面上的差异及其在翻译中的特殊作用     

论WTO争议解决机制及我国入世后的对策

文章介绍了WTO争议解决机制的法律渊源和运作程序 ,分析了我国入世后最容易产生争议的领域 ,阐述了WTO争议解决机制在我国的运用和针对争议我们应采取的防范措施