A Class of Efficient Non-parametric K-sample Tests for Multivariate Counting Processes with Frailties

A K -sample testing problem is studied for multivariate counting processes with time-dependent frailty. Asymptotic distributions and efficiency of a class of non-parametric test statistics are established for certain local alternatives. The concept of efficiency is to show that for every non-parametric test in this class, there is a parametric submodel for which the optimal test has the same asymptotic power as the non-parametric one. The theory is applied to analyse a diabetic retinopathy study data set. A simulation study is also presented to illustrate the theory     

世界新秩序和美国对华新政策

本文论述美国１９９７年后对华新政策。文章综述９０年代起美国历届政府的对华的检讨,到１９９７年克林顿政府采取对华新政策,主要是稳定亚洲、中国大陆、台湾,以确保美国在亚洲战略地位和经济利益     

Goodness-of-fit Tests for Semi-Markov and Markov Survival Models with One Intermediate State

Survival data with one intermediate state are described by semi-Markov and Markov models for counting processes whose intensities are defined in terms of two stopping times T ₁< T ₂. Problems of goodness-of-fit for these models are studied. The test statistics are proposed by comparing Nelson–Aalen estimators for data stratified according to T ₁. Asymptotic distributions of these statistics are established in terms of the weak convergence of some random fields. Asymptotic consistency of these test statistics is also established. Simulation studies are included to indicate their numerical performance.     

Policies on and Experiences of Foreign Domestic Workers in Canada

This paper reviews studies of government policies on, and the experiences of, foreign domestic workers in Canada. It provides an overview of changes in Canadian policies regulating foreign domestic workers and in their demographic composition in Canada over recent decades. It identifies three analytical themes in studies about their experiences such as: (1) conceptualizing citizenship in policy-making as contested; (2) documenting the inherently exploitative nature of the programme; and (3) examining the intersectionality of class, race, and gender. The review is guided by feminist scholarship on reproductive labour in the household. It identifies unaddressed issues and proposes future directions for studies of foreign domestic workers in Canada.     

Penalized full likelihood approach to variable selection for Cox’s regression model under nested case–control sampling

Lifetime Data Analysis - Assuming Cox’s regression model, we consider penalized full likelihood approach to conduct variable selection under nested case–control (NCC) sampling....     

Do Rural Students Really Perform Worse than Urban Students Do? Empirical Evidence from a University Entrance Program in Taiwan

Despite a major expansion in the number of students in higher education, students from rural areas continue to be underrepresented at selective universities. To reduce the urban‐rural imbalance of entry to selective universities, institutions in many countries of the world have implemented admission policies favoring rural students. Previous evidence has shown that rural students have lower academic performance than their urban peers, which leads to concern that rural students will reduce the academic excellence of selective universities. Using the introduction of a university admission policy favoring rural students in Taiwan and a unique administrative data set of students' academic records, we compare the academic performance of students from rural areas with that of their urban counterparts during their college years. The results show that rural students have consistently outperformed urban students in semester grade point averages and class rank percentile across time; however, the differences in academic performance are mainly attributed to the rural students' initial outperformance in the first semester of the freshman year.     

李约瑟之谜——拿证据来?

中国科技史专家李约瑟提出,古代中国在科技和经济上均领先西欧,为什么16世纪后的中国科技却陷于停滞,现代科技和工业革命也未能萌发于中国？对此,各科学者众说纷纭,然而,各家之言都缺乏史实的证据。科技探索的动机举世皆然,解释李约瑟之谜的关键在于行为的约束条件。在中国历史制度变迁过程中,“单一权威”始终是主导因素,不仅科技创新行为因此被阻遏,众多独特的历史现象亦与之激励相容。更有说服力的是,如果将儒家作为单一权威制度下的主流意识形态,那么,中国历代的知识结构都能与单一权威制度相呼应。而且,“让书目说话”的做法在方法论上的意义也超过了对李约瑟之谜的回答。     

One for Nine: The Shared Cataloging Program of the California Digital Library

Abstract

In 1999, the California Digital Library (CDL) began a new cooperative venture, the Shared Cataloging Program, to improve access to its growing collection of electronic resources. Now known within the University of California (UC) as the SCP, the Shared Cataloging Program, based at UC San Diego, distributes ready-to-use cataloging records for all electronic titles licensed by the CDL to each of the other eight (soon to be nine) physical UC campuses. The SCP is the result of an intensive systemwide planning process fostered by a desire for an innovative approach to providing traditional bibliographic access to large numbers of electronic resources. It was launched out of pragmatic necessity along with an institutional commitment to the cooperative ideals of labor-savings, experimentation, and the search for “best practices.” This article will describe its genesis, current operation, one library's use of the records, and issues for future development. Serials Review 2002; 28:4–12.