Non-ignorable missing covariate data in survival analysis: a case-study of an International Breast Cancer Study Group trial

Summary.  Non-ignorable missing data, a serious problem in both clinical trials and observational studies, can lead to biased inferences. Quality-of-life measures have become increasingly popular in clinical trials. However, these measures are often incompletely observed, and investigators may suspect that missing quality-of-life data are likely to be non-ignorable. Although several recent references have addressed missing covariates in survival analysis, they all required the assumption that missingness is at random or that all covariates are discrete. We present a method for estimating the parameters in the Cox proportional hazards model when missing covariates may be non-ignorable and continuous or discrete. Our method is useful in reducing the bias and improving efficiency in the presence of missing data. The methodology clearly specifies assumptions about the missing data mechanism and, through sensitivity analysis, helps investigators to understand the potential effect of missing data on study results.     

爱的憧憬与“好色”情调——由川端康成孤儿的情感说起

少女光洁的肌肤、纯洁的心灵和母性的温情是孤儿川端的“救世主”,在感官与纯洁、母性与少女之间川端作品中出现了美女与佛的结合,进而形成了其文学中感官因圣洁而得到净化的“好色”情调。因此,从内在的形成原因来看,川端文学的“好色”情调是其诗化了的孤儿的缺失体验。     

品牌女装消费者对价格促销的态度研究

运用问卷调查的方式，对广州市品牌女装消费者对价格促销的态度进行研究，有如下结论：不同品牌忠诚度的消费者对价格的重视度有显著的差异，价格促销对忠诚度越低的人越有影响；不同品牌忠诚度的消费者在不同的价格促销状态下的态度存在差异，偶尔的深度折扣对感知价格评价和对购买意向的影响方面皆较为积极；消费者在打折时的质量感知、购买意向、期望促销持续时间、感知知名度和感知价格的评价都较为积极；忠诚度较高的消费者有着更高的折扣区间；优惠券对刺激消费者购买意向的作用非常有限。     

类型电影与观众态度

根据电影叙事是否依据一个形式惯例传统,电影理论把电影分为类型电影和非类型电影。事实上,来自于既有惯例的类型经验影响着我们从日常生活到艺术欣赏很多行为中所具有的心理模式,我们的相关态度在很大程度上也以此建立。本文讨论的是在观看类型电影的时候观众的欣赏态度,并将这个态度分为"作为基础的惯例经验"、"欣赏时建构的心理时空"和"态度的娱乐指向"三个部分,从中可以看到三个部分的相互关系和观众欣赏类型电影的心理特征。     

回归生活世界:当代道德教育的呼唤

道德教育根源于生活,旨在导引并成就一种可能的幸福生活。现实中,道德教育与生活世界的背离使回归生活成为教育界日益强烈的呼声。胡塞尔的生活世界理论为道德教育回归生活提供了理论基石,而道德教育自身与生活世界相融的特性也使其回归成为可能。     

例外：论小津安二郎

通过考察电影导演小津安二郎作品的特殊光晕（aura）,解释他何以能够凭保守的姿态赢得普遍的赞美。希望在解读了小津电影的根本情节、主要色彩和精神结构后,能够回答这么一个问题：小津何以不再可能？     

人生之谜和超验之美——体悟《红楼梦》

从大观的此岸和大荒的彼岸之对话及今日之我对昨日之我的审视 ,体悟《红楼梦》的超验之美和人生之谜。并试图探索艺术意象对造就《红楼梦》艺术至境的作用。     

管窥石湾陶瓷艺术

石湾陶瓷艺术品类繁盛,在实用功能中蕴涵着石湾陶瓷艺术对生命价值的追求,在百姓日常生活场景中再现着石湾陶瓷艺术对生活的解读;在各类历史典故和民间传说中表达着石湾陶瓷艺术的价值判断和对日常生活的超越。     

论文艺复兴时期人文主义与科学精神的塑造

文艺复兴时期的人文主义重视世俗生活和人的现实享乐,把对财富的拥有看作享受的根本基础,驱动了新航路的开辟,为近代科学精神的塑造奠定了实践基础。人文主义唤起了人们探求人自身和客观世界的奥秘,用理性的眼光观察世俗的社会生活,用求证试验的方法验证真理。人文主义否认权威;追求知识,捍卫真理,从而塑造了科学精神。     

Women's Changing Attitudes Toward Divorce, 1974–2002: Evidence for an Educational Crossover

This article examines trends in divorce attitudes of young adult women in the United States by educational attainment from 1974 to 2002. Women with 4‐year college degrees, who previously had the most permissive attitudes toward divorce, have become more restrictive in their attitudes toward divorce than high school graduates and women with some college education, whereas women with no high school diplomas have increasingly permissive attitudes toward divorce. We examine this educational crossover in divorce attitudes in the context of variables correlated with women's educational attainment, including family attitudes and religion, income and occupational prestige, and family structure. We conclude that the educational crossover in divorce attitudes is associated most strongly with work and family structure variables.