初等r-循环矩阵的几个性质

给出了初等ｒ－循环矩阵可逆的充要条件及逆矩阵的表达式;对奇异的初等ｒ－循环矩阵给出了Ａ的一个ｇ－逆Ｇ（满足ＡＧＡ＝Ａ,ＧＡＧ＝Ｇ）及Ｍｏｏｒｅ－ｐｅｎｒｏｓｅ广义逆矩阵的表达式．     

基于Fréchet Copula的欧式脆弱期权定价

运用Fréchet Copula和相关性测度Kendallτ来刻画脆弱期权行权概率与对手方违约之间的相关结构,并给出了欧式脆弱看涨期权价格的闭形式表达式.然后由Kendallτ和标的资产价格与执行价格比率的不同数值,对欧式脆弱看涨期权的价格进行了数值计算和敏感性分析.结果表明,随着τ值的增加和标的资产价格与执行价格比率的降低,欧式脆弱看涨期权的价值相应地呈下降趋势,这与理论结果和实际都是相符的.     

缓和与1973年中东战争的爆发

缓和是冷战时期的特定阶段,美苏对缓和的认知影响了双方在中东地区的政策及解决中东危机的进程。1973年中东战争的爆发,既与美苏对缓和的认知与推动有关,也离不开埃及对缓和的追求。美苏缓和虽缓解了彼此间的紧张关系,但由于美苏对缓和的追求漠视了埃及的缓和努力与阿拉伯国家对被占领土的诉求,这成为促发战争爆发的外源性因素。美苏缓和对阿以僵局的维持,埃及缓和外交的失败与以色列的强硬立场,使萨达特放弃了外交努力而发动了斋月战争。     

走出国有资产转让的三大认识误区

国有资产转让是国企改革的重要组成部分,其成败将直接影响、甚至决定国企改革的进程与结果。我们必须走出账面价值的认识误区,注重未来预期收益的“折现值”,走出资产流失的认识误区,注重资产流失与假资产流失之名行捣乱非流失资产转让之实的双重防范;走出否定国有资产转让的误区,充分意识因噎废食有可能拒一切转机于门外,而完善法规则可以亡羊补牢。     

试论"三个代表"与"人民代表"

"三个代表"是我们党的立党之本、执政之基、力量之源,也是新时期人大工作的指导思想."人民代表"(通称人大代表)是我国根本政治制度的基石和组成细胞,是实现"人民当家作主"和体现"一切权力属于人民"的社会主义民主的重要途径.在人大工作中,特别是在人民代表大会的代表制度建设中,落实"三个代表"的要求,是新时期所面临的新要求、新任务和新挑战.     

谈市场经济条件下城市粮食安全的预警保障问题

在实行粮食经济的市场化后 ,尽管国际、国内两个市场为解决粮食问题拓宽了空间 ,但是由于粮食商品的自然属性及战略属性 ,由于市场调节的自身缺陷 ,粮食供求矛盾激化、市场形势突变的情况不可避免。粮食短缺对国家和民族的危害不言而喻 ,确保粮食安全 ,维护国民的正常的生产生活秩序和社会稳定是地方行政当局必须考虑的问题     

华裔美国文学的族裔想象和文化认同

《中国佬》、《喜福会》、《甘加丁之路》和《典型的美国佬》这四部华裔美国文学作品具有鲜明的族裔意识,在颠覆话语陈规、重写历史和建构身份的过程中发挥了积极的作用。对这些个案进行分析,可以从不同层面阐释文化认同的复杂性和策略的多变性,揭露和批判种种表象背后所隐匿的话语霸权和意识形态性。     

热奈特的类文本理论及其效应

杰拉德·热奈特的类文本理论受到中西方学界的关注与重视,一些学者对该理论进行了一定的补充和修正工作,也有不少学者将其用于文学研究。类文本理论视阈下,文学研究的对象为环绕于文本边缘的类文本要素,如作者的署名、序言、献词、题记、版权页信息等。将作者重新纳入批评视野,类文本理论有效修正了文本理论将文本与作者相割裂的不当做法;将出版商引入批评框架,类文本理论不仅拓展了传统文学批评体系,还起到限制读者过度阐释的目的。同时,类文本理论促进了叙事学的进一步发展,使文学研究从文本中心走向文本边缘,并将文学的内部研究和外部研究相结合,从而推进了文学批评理论的发展。鉴于类文本与文本的互存关系,某些类文本和文本之间的界限模糊不清,它们在具备类文本属性的同时,又不乏文本的属性,而这一特性又恰恰佐证了类文本之于文本而存续的重要性。     

The Relationship Between Wife’s Education and Husband’s Earnings: Evidence from 1960 to 2000

Previous research finds a positive relationship between a wife’s education and her husband’s earnings using data from the 1960s. Earlier theories suggest that benefits accrue from informational sharing between partners in a marriage. This paper tests the hypothesis that a wife’s education is positively associated with her husband’s earnings, using data from the 1960, 1970, 1980, 1990, and 2000 Censuses. Between 1960 and 2000, the educational attainment and labor-force participation of married women has increased dramatically. As women have embarked upon their own careers, has their education continued to be positively associated with their husbands’ earnings? Yes. The coefficient of the wife’s education remains positive and significant for all the years under study. The size of the coefficient decreases, however, from 1960 to 2000.     

Restricted most powerful Bayesian tests for linear models

Uniformly most powerful Bayesian tests (UMPBTs) are a new class of Bayesian tests in which null hypotheses are rejected if their Bayes factor exceeds a specified threshold. The alternative hypotheses in UMPBTs are defined to maximize the probability that the null hypothesis is rejected. Here, we generalize the notion of UMPBTs by restricting the class of alternative hypotheses over which this maximization is performed, resulting in restricted most powerful Bayesian tests (RMPBTs). We then derive RMPBTs for linear models by restricting alternative hypotheses to g priors. For linear models, the rejection regions of RMPBTs coincide with those of usual frequentist F‐tests, provided that the evidence thresholds for the RMPBTs are appropriately matched to the size of the classical tests. This correspondence supplies default Bayes factors for many common tests of linear hypotheses. We illustrate the use of RMPBTs for ANOVA tests and t‐tests and compare their performance in numerical studies.