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.     

通过尘障后的激光束特征

从辐射亮度方程出发,推导了在大粒子近似条件下,激光束通过尘障以后约化通量密度和漫射通量密度的表达式,并在四个常用激光波长上作了数值计算.结果表明,当散射粒子浓度较大时,尘障后表面上的漫射通量密度通常比约化通量密度高很多,且散布在较宽的范围内.随着光束远离尘障,漫射通量密度迅速减小,约化通量密度重新占据主导地位.     

层次分析法在成套设备招标评标中的应用

介绍层次分析法的择优原理及其在成套设备招标评标中的应用;给出计算机软件包,以克服层次分析法计算量过大的缺点。     

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.     

随机型细胞神经网络的稳定性

借助于李雅谱洛夫理论、矩阵分析方法和It?公式,结合不等式分析技巧,研究了随机细胞神经网络系统的均方指数稳定性,给出了系统的解的二阶矩Liapunov指数估计式和均方指数稳定的充分条件。     

基于ASP技术的Access数据库安全隐患及其对策

针对当前广泛使用的ASP和Access数据库相结合的技术 ,提出了采用此技术的几个常见的安全问题 ,并指出需要采用的一些安全措施     

社会转型时期制度伦理研究及其意义

“社会转型”是一个非常重要的现代解释性概念,在最宽泛的意义上,“社会转型”所要表达的是社会从传统社会向现代社会实现的历史性跃迁。在“社会转型”的理论视阈中,作者认为,制度伦理作为社会主义市场经济条件下公共伦理的主要表现形式,既关系到当前中国制度变革的方向和社会发展的未来前景,同时又成为社会伦理体系建设的基本途径。研究社会转型时期的制度伦理的主要目的,就是要建立社会转型时期制度的合理秩序,促进社会转型时期制度的和谐发展和良好循环。基于如上认识,本文分析了制度和制度伦理的基本含义,阐释了制度伦理学的基本问题,探讨了转型时期社会秩序的建立过程中制度伦理存在的意义。     

知识产权·人权·发展

现有的知识产权制度正在朝着保护经济利益的方向发展,也因此引发了世界范围内关于知识产权与人权问题上的争论。知识产权的提出与制度化发展是人类社会发展的必然结果,具有哲学、经济学上的合理性。从本质上看,知识产权属于私权。但同时知识产权也属于发展权的一个重要组成部分。只有对知识产权的发展权本质进行深入的探讨和研究,才能把握知识产权发展思想的真谛和实现知识产权制度的价值目标。