Weakly implementable social choice rules

Previous investigations have shown that a social choice function which is partially implementable must be characterized by pervasive veto power. This paper investigates how much additional latitude in the design of social choice functions, and how much relief from this vetoers result, can be achieved by examining multi-valued social choice rules and relaxing the requirement of partial implementability to a requirement that we call weak partial implementability. We find that the power structures which characterize partially implementable social choice functions, including the veto properties, also characterize weakly partially implementable social choice rules. The conclusion is that invoking multi-valuedness and implementation of appealing social choice rules in strong Nash equilibria. Our results apparently exhaust the possibilities for implementation in strong Nash equilibrium. If any implementation possibility results are to be achieved, they can apparently come only by weakening the equilibrium requirement.     

非传统安全视角下的云南跨界民族问题

冷战结束后,云南边境地区的安全因素发生了重大变化,安全威胁由防御邻国向我国侵犯等传统安全要素逐渐转向防止各种跨国犯罪和贩毒走私为特征的非传统安全,跨界民族问题成为引发云南边疆地区非传统安全的重要因素之一,给边疆安全带来前所未有的挑战。从云南跨界民族问题与非传统安全关系入手,分析由云南跨界民族所产生的非传统安全问题,提出解决云南跨界民族问题的一些设想,是十分必要的。     

东亚分离主义（下篇）——台湾分离主义运动

通过对台湾分离主义运动即"台独"的起源、发展演变、产生与膨胀的背景原因的分析,指出台湾分离主义运动无论在岛内还是国际社会都属于非主流,是不稳定因素,不仅危害台海和平与中国安全,也对地区与世界和平构成威胁.     

明代社会世态人情的裸露--《金瓶梅》与明代社会新思潮

明代中叶,随着社会经济经基础的深刻变化,人们的生活方式、精神状态、审美情趣和价值取向也发生了种种变化。产生于明代嘉靖、万历年间的长篇世情小说《金瓶梅》,在对当时社会世态人情的描绘中,已经比较明显地体现了这一时期社会思潮中的某些重要方面:商业活动中社会各阶层对商业利润的趋之若骛,商贾社会地位的提高,以及传统四民关系的转变;两性关系上人们打破了文化传统中那种社会性、伦理性对人的个体心性的禁锢,而表现出对非理性情感和欲求的渴望与追求;服饰上撼动了高压在人性上面等级观念的磐石,表现出一股“去朴从艳”、逾礼越制的社会思潮。     

对G-Paillier加密体制的改进与分析

通过适当地选择参数改进了推广的Paillier(G-Paillier)加密体制,减少运算量,提高了加密体制的效率;证明了改进后加密体制的安全性(单向性、语意安全性)与G-Paillier加密体制的安全性是等价的。     

Social identities and political cleavages: the role of political context

Summary. Using a novel method, the paper investigates the influence of social group identities on attitudes and on voting in a variety of political contexts. Examining the major regions of Britain, Canada and the USA, we find considerable national and regional diversity in the nature of social cleavages. For example, social class and race had widely different effects across societies, but within societies their effects on attitudes and on voting were very similar. However, despite that, age and religion had a similar effect on attitudes across societies; the effects on voting varied considerably. The significant within-country differences underline the importance of using region, rather than country, as the unit of analysis. More importantly, these results highlight the role of political context, especially competing cleavages and the structure of party competition, in the establishment of politically relevant social cleavages.     

论QFII的有效实施策略

分析了QFII(合格境外机构投资者制度 )产生的国内外背景 ,并结合背景阐述了我国实施QFII的目的及意义 ,最后借鉴台湾、韩国等国家 (地区 )实施QFII的经验提出了我国有效实施QFII时应注意的几个问题     

增权：受虐待老人社会工作新理念

针对不断增加的虐待老年人这一社会问题,将增权理论及理念运用于老年人社会工作中,结合对老年人受虐待现状和困境的考察与分析,探讨了帮助受虐待老年人维护自身合法权益的有效工作方法。     

Herd behavior and the quality of opinions

This paper analyzes a decentralized decision model by adding some inertia in the social leaning process. Before making a decision, an agent can observe the group opinion in a society. Social learning can result in a variety of equilibrium behavioral patterns. For insufficient ranges of quality (precision) of opinions, the chosen stationary state is unique and globally accessible, in which all agents adopt the superior action. Sufficient quality of opinions gives rise to multiple stationary states. One of them will be characterized by inefficient herding. The confidence in the majority opinion then has serious welfare consequences.