Moments of Special Normally Distributed Matrices

In solving systems of simultaneous random linear algebraic equations some approximating methods lead to the problem of determinating moments of special random matrices and vectors. In this article corresponding formulas are provided for moments of some normally distributed matrices. The deduced relations can be considered as a generalization of the known formulas for the central moments of normally distributed random variables.     

Independence and Dependence in Aging

No abstract available for this article.     

跨文化语境下中国公案小说的西传与回溯——以荷兰高罗佩《迷宫案》为例

<迷宫案>是荷兰汉学家高罗佩用英语创作的二十四种狄公案系列小说中的第二种,也是由他亲自翻译为中文的唯一一种.高罗佩西传与回溯狄公故事的实践使中国公案小说在改良中得以重生,同时也向西方世界打开了一扇展示中国刑律制度和广博文化的窗口.上世纪八十年代初,中国外交官陈来元也将<迷宫案>译介给中国读者,完成了该小说的二重回溯.漫长的跨文化传播历程使<迷宫案>小说及狄公形象得到多重阐释和想象,使之成为跨文化语境下中国公案小说西传与回溯的成功案例.     

Asymptotics for tests on mean profiles,additional information and dimensionality under non-normality

We consider the comparison of mean vectors for k groups when k is large and sample size per group is fixed. The asymptotic null and non-null distributions of the normal theory likelihood ratio, Lawley–Hotelling and Bartlett–Nanda–Pillai statistics are derived under general conditions. We extend the results to tests on the profiles of the mean vectors, tests for additional information (provided by a sub-vector of the responses over and beyond the remaining sub-vector of responses in separating the groups) and tests on the dimension of the hyperplane formed by the mean vectors. Our techniques are based on perturbation expansions and limit theorems applied to independent but non-identically distributed sequences of quadratic forms in random matrices. In all these four MANOVA problems, the asymptotic null and non-null distributions are normal. Both the null and non-null distributions are asymptotically invariant to non-normality when the group sample sizes are equal. In the unbalanced case, a slight modification of the test statistics will lead to asymptotically robust tests. Based on the robustness results, some approaches for finite approximation are introduced. The numerical results provide strong support for the asymptotic results and finiteness approximations.     

A generalization of the multivariate slash distribution

In this paper, we propose a generalization of the multivariate slash distribution and investigate some of its properties. We show that the new distribution belongs to the elliptically contoured distributions family, and can have heavier tails than the multivariate slash distribution. Therefore, this generalization of the multivariate slash distribution can be considered as an alternative heavy-tailed distribution for modeling data sets in a variety of settings. We apply the generalized multivariate slash distribution to two real data sets to provide some illustrative examples.     

Modeling multiple‐response categorical data from complex surveys

Although “choose all that apply” questions are common in modern surveys, methods for analyzing associations among responses to such questions have only recently been developed. These methods are generally valid only for simple random sampling, but these types of questions often appear in surveys conducted under more complex sampling plans. The purpose of this article is to provide statistical analysis methods that can be applied to “choose all that apply” questions in complex survey sampling situations. Loglinear models are developed to incorporate the multiple responses inherent in these types of questions. Statistics to compare models and to measure association are proposed and their asymptotic distributions are derived. Monte Carlo simulations show that tests based on adjusted Pearson statistics generally hold their correct size when comparing models. These simulations also show that confidence intervals for odds ratios estimated from loglinear models have good coverage properties, while being shorter than those constructed using empirical estimates. Furthermore, the methods are shown to be applicable to more general problems of modeling associations between elements of two or more binary vectors. The proposed analysis methods are applied to data from the National Health and Nutrition Examination Survey. The Canadian Journal of Statistics © 2009 Statistical Society of Canada     

Immigration and the public sector: Income effects for the native population in Sweden

The immigrants' age structure and labour market situation are major determinants for their net contribution to the public sector. During the 50s, 60s and the 70s the immigrants' net contributions gave positive income effects for the native Swedes. Nowadays there are negative income effects due to the deteriorating employment situation among the immigrants. The yearly positive or negative income effects have at most been 1–2% of the gross national product. A change in the immigrants' employment rate by 1 percentage unit will change their yearly net contribution to the public sector by 0.1% of the gross national product. Received: 2 February 1996/Accepted: 28 July 1998     

格林伯格和多边比较法的应用

格林伯格的学术研究主要以比较语言学理论为中心，以多边比较法(也叫大规模比较法)为其主要方法论。他利用多边比较法对世界语言进行分类，首先他把非洲语言分为四个大的语系，然后又对其他地区的语言进行分类，并提出了相应的假说，即:印度-太平洋语系假说、美洲印第安语系假说和欧亚语系假说。但是他的方法论并不适用于所有地区的语言分类，同时它的客观性也值得怀疑。     

张学良高等教育思想中的人才观

张学良于1928年执政东北并兼任东北大学校长,他坚信国家富强之关键在于人才的培养,他多次捐出私产,倾力发展大学教育。在张学良主办大学教育、推动东北高等教育发展的过程中,完全体现出他吸引人才、厚待人才、重用人才之观念,他的努力最终使得东北大学这一地方大学在30年代初跻身中国一流大学的行列。分析张学良的人才观念,能使我们更深入地了解这一历史人物以教育振兴东北的爱国爱乡情怀,并冀图对当今的大学教育的发展提供借鉴和某种思路。     

突发公共卫生事件中的“相称性原则”探讨

探讨公共卫生领域中相称性原则产生的必要性、含义和构成要素,并分析相称性原则在突发公共卫生事件（如H1N1流感）中的应用,这无疑具有重大意义。