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31.
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 相似文献
32.
Koji Takamiya 《Social Choice and Welfare》2003,20(1):77-83
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. 相似文献
33.
刘瑶 《山西大学学报(哲学社会科学版)》2003,26(1):123-126
第十四届釜山亚运会 ,中国代表团以绝对优势 ,位于亚洲各国之首 ,但是与世界体育强国相比较 ,还有一定的差距。本文通过对釜山亚运会的反思 ,具体分析我国的优势项目与不足之处 ,在今后的 6年中 ,全面改进 ,才能使中国军团在北京奥运会再创佳绩。 相似文献
34.
强苯赛浸种对水稻幼苗的根长、根重和根系体积都有促进作用,能提高根尖细胞分裂指数,能使胚根尖切段伸长和发根力增强,并能提高胚乳中淀粉酶活性和根系的呼吸强度。 相似文献
35.
刘尧 《中国地质大学学报(社会科学版)》2002,2(1):33-36
本文提出西部大开发的主体是全国人民 ,客体为西部资源 ,并在此基础上探讨了西部教育资源开发观。 相似文献
36.
37.
Frank De Zwart 《Theory and Society》2005,34(2):137-169
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. 相似文献
38.
39.
姚爱萍 《山西煤炭管理干部学院学报》2002,15(1):33-34
高等职业技术教育的任务之一 ,就是培养学生的动手能力和实践能力。通过物理课的教学 ,可以培养学生的思维能力、动手实践能力、分析问题和解决问题的能力。 相似文献
40.
曾耀农 《郑州轻工业学院学报(社会科学版)》2002,3(2):13-16
实践美学经过百余年的发展已成为一门较为成熟的美学学派 ,但进入 2 0世纪 90年代以后受到了来自各方面的责难与挑战。要坚持和发展实践美学 ,就应当在体系、范畴和话语等方面采取全方位开放的策略。而实践美学的全方位开放最终还是要归结到实践美学学者心态和思想的开放。 相似文献