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.     

DIFFERENT AND SAME: FAMILY THERAPY WITH ASIAN-AMERICAN FAILIES

This paper is written for non-Asian family therapists who must deal with an increasing number of Asian-American client families. Unlike some writers in fthe field who advocate that client and therapist have the same ethnic background, the authors belive that cultural sensitivity can be learned. Several culturally important values are described, and suggestions on how to orient treatment to fit this client population are offered. A Detailed case example illustrates the treatment issues involued.     

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.     

心理契约在企业管理中的应用

在企业和员工之间,除了正式的、显性的聘任契约外,还存在着隐含的、非正式的、未公开说明的心理契约。面对许多行业引入市场机制后所带来的改制、竞争等严峻形势,存在于组织和组织成员之间的这种心理契约关系对激发和调动员工的积极性,增强组织凝聚力,实现组织成员的个人目标与组织目标的有机统一,保证企业快速、健康和高效的发展,必将起到积极的推动作用。     

现代性的反叛与理论社会学的前景

现代性又一次显示了自己的永新特征:它不断脱出既有的形貌,日益变得轻盈、灵巧、液化、流变,它的经验结果也更为不确定和难以预料。这造成了现代叙事和想像的“衰败”,也使社会学的批判和反思走向亢奋。然而,在西方社会学“新三圣”的现代性理论中,激进具象下隐匿的深沉困惑和焦虑表明,这无以挽回旧式现代性的总体颓落之势。与此同时,现代性在中国正面对着一种新生。“社会互构”理论指出了新型现代性的大趋势,即以人为本而不是以资本为本的实践选择,正在促使资本从目的性意义向手段性位置回归。这一理论还阐释了,通过多元社会主体的“互构谐变”,推进社会沟通、对话、协商以及论坛和听证的制度化,实现我们对于和谐社会的共同期待。正是这一来自实践的理路,使理论社会学拥有了一个赢得未来的起点。     

多元文化背景下的教育公平问题

我国是一个拥有 5 6个民族 ,其中 5 5个为少数民族的多民族国家。民族自治区域占全国 6 4 % ,人口超过 1亿 ,操 80多种语言 ,用 39种文字。由于汉族人口占绝大多数 ,且分布广 ,其生产与经营活动范围大 ,所以 ,汉语自然成为各民族的族际语。随着各民族的频繁交流和相互依赖 ,大部分少数民族地区已经形成了“民汉兼通”的双语社会形式 ,也因此建立了以实施双语教育为主的学校教育体系。少数民族地区的学校教育体系是整个国家学校教育体系的一个组成部分 ,虽然教师可以用不同的语言教学生 ,但是教授的内容、评价的标准、选拔的形式 ,即课程和考试的标准却是统一的。从各个地区的中考和高考的情况看 ,少数民族学生被淘汰的比例远远高于汉族学生。许多研究也证明 ,大多数少数民族学生在小学和中学的学习有困难 ,甚至跟不上学习进度 ,辍学率较高。许多专家经过研究后归纳出了多种原因 :或是智商问题 ;或是人口素质问题 ;或是经验与文化上的冲突 ;或是对学校教育的不适应 ;或是经济贫困等原因。这些原因都有一定道理 ,但有一个根本的问题 ,即应当从教育公平方面探讨少数民族学生的教育问题     

连续出版物机读目录数据库的建设与发展

连续出版物机读目录数据库是图书馆书目数据库的重要组成部分 ,也是图书馆自动化管理和资源共享的基础工作。本文对连续出版物建库工作进行分析 ,对存在的问题提出解决的途径和方法