The Copula Information Criteria

We derive two types of Akaike information criterion (AIC)‐like model‐selection formulae for the semiparametric pseudo‐maximum likelihood procedure. We first adapt the arguments leading to the original AIC formula, related to empirical estimation of a certain Kullback–Leibler information distance. This gives a significantly different formula compared with the AIC, which we name the copula information criterion. However, we show that such a model‐selection procedure cannot exist for copula models with densities that grow very fast near the edge of the unit cube. This problem affects most popular copula models. We then derive what we call the cross‐validation copula information criterion, which exists under weak conditions and is a first‐order approximation to exact cross validation. This formula is very similar to the standard AIC formula but has slightly different motivation. A brief illustration with real data is given.     

Star-Type Systematic Sampling Schemes for Finite Populations

Two new sampling schemes namely, Star-Type Systematic (STS) sampling without replacement and Modified Star-Type Systematic (MSTS) sampling without replacement for estimation of finite population means are introduced. The relative performances of the proposed star-type systematic sample means along with those of the simple random and systematic sample means are assessed for a hypothetical population with a linear trend and also for certain natural populations. Furthermore, the usefulness of the proposed sampling schemes in quality control and for constructing partial diallel crosses in mating designs are briefly break discussed.     

多级评分模型中的分部评分模型

本文通过对分部评分模型与等级反应模型、评定量表模型的比较,对分部评分模型的特色作了较为深入的剖析,从而为其在现代测验领域的应用在理论上进行了抛砖引玉的阐述。     

The deterministic EPQ with partial backordering: A new approach

Several authors have developed models for the EOQ when only a percentage of stockouts will be backordered. Most of these models are complicated, with equations unlike those for the EOQ with full backordering. In this paper we extend work by Pentico and Drake [The deterministic EOQ with partial backordering: a new approach. European Journal of Operational Research 2008; in press] that developed equations for the EOQ with partial backordering that are more like those for the EOQ with full backordering to develop a comparable model for the EPQ with partial backordering.     

我国定向运动员神经类型特征研究

运用文献资料法、测验法等方法对湖南、广东等省定向运动员的神经类型进行调查分析。结果表明:神经类型分布为亚稳定型所占比例最大,易扰型所占比例排第二,没有模糊型。被测者没有表现出明显的项目特征,反映出对定向运动员的选材工作还有待科学化、全面化。     

农民工与留守子女日常沟通问题研究

通过大规模问卷调查及访谈发现,农民工与留守子女日常沟通中存在的一般问题包括:较低的沟通频率影响留守子女包容需要的满足,沟通方式单一化导致对留守子女的过分控制,沟通内容功利化不足以满足留守子女情感需求;其技术层面的问题包括:农民工及留守子女对语言交际原则的理解比较欠缺,语言交际能力总体较弱,对语境化要求的忽视导致留守儿童产生反感情绪,对留守子女需求的误读致使农民工不太注意会话策略.据此,提出了微观环境中提升农民工和留守子女的参与能力,中环境方面增强留守子女的联结,外环境方面构建适宜的支持网络以及宏观环境提供合理的沟通培训等对策.     

英语习语翻译策略的跨文化比较分析

习语隐含的文化信息是习语翻译的重点和难点所在,关乎能否成功实现跨文化交际。通过详细分析习语翻译例子,对比英汉两种语言文化异同,从两种语言文化匹配程度这一新视角探讨英语习语汉译的最佳策略,有利于教师跨越文化障碍,提升习语翻译的教学效果。     

Do public pensions matter for health and wellbeing among retired persons? Basic and income security pensions across 13 Western European countries

Esser I, Palme J. Do public pensions matter for health and wellbeing among retired persons? Basic and income security pensions across 13 Western European countries Int J Soc Welfare 2010: ??: ??–??© 2010 The Author(s), Journal compilation © 2010 Blackwell Publishing Ltd and International Journal of Social Welfare. Mortality rates suggest that elderly people in the advanced welfare democracies have experienced dramatically improved health over the past decades. This study examined the importance of public pensions for self‐reported health and wellbeing among retired persons in 13 Organisation for Economic Cooperation and Development countries in 2002–2005. New public pension data make it possible to distinguish between two qualities of pension systems: ‘basic security’ for those who have no or a short work history, and ‘income security’ for those with a more extensive contribution record. For enhanced cross‐national comparison, relative measures of ill‐health and wellbeing were constructed to account for cultural bias in responses to survey questions and heterogeneity among countries in the general level of population health. Overall, better health is found in countries with more generous pensions, although the results are gendered; for women's health, high basic security of the pension system appears to be particularly important. Women's wellbeing also tends to be more dependent on the quality of basic security.     

思想政治理论课教材衔接与整合研究——基于中学和大学思政课教材内容的实证分析

科学发展观是高校加强和改进思想政治教育工作的思想指针。高校思想政治教育必须在科学发展观的统筹下,全面贯彻落实科学发展观的精神实质和基本要求,认真探索高校思想政治教育的规律和实践路径,不断开创高校思想政治教育的新视野。     

Asymptotic Properties for a Class of Partially Identified Models

We propose inference procedures for partially identified population features for which the population identification region can be written as a transformation of the Aumann expectation of a properly defined set valued random variable (SVRV). An SVRV is a mapping that associates a set (rather than a real number) with each element of the sample space. Examples of population features in this class include interval‐identified scalar parameters, best linear predictors with interval outcome data, and parameters of semiparametric binary models with interval regressor data. We extend the analogy principle to SVRVs and show that the sample analog estimator of the population identification region is given by a transformation of a Minkowski average of SVRVs. Using the results of the mathematics literature on SVRVs, we show that this estimator converges in probability to the population identification region with respect to the Hausdorff distance. We then show that the Hausdorff distance and the directed Hausdorff distance between the population identification region and the estimator, when properly normalized by , converge in distribution to functions of a Gaussian process whose covariance kernel depends on parameters of the population identification region. We provide consistent bootstrap procedures to approximate these limiting distributions. Using similar arguments as those applied for vector valued random variables, we develop a methodology to test assumptions about the true identification region and its subsets. We show that these results can be used to construct a confidence collection and a directed confidence collection. Those are (respectively) collection of sets that, when specified as a null hypothesis for the true value (a subset of values) of the population identification region, cannot be rejected by our tests.