Variance Function Regression in Hierarchical Age-Period-Cohort Models: Applications to the Study of Self-Reported Health

Two long-standing research problems of interest to sociologists are sources of variations in social inequalities and differential contributions of the temporal dimensions of age, time period, and cohort to variations in social phenomena. Recently, scholars have introduced a model called Variance Function Regression for the study of the former problem, and a model called Hierarchical Age-Period-Cohort regression has been developed for the study of the latter. This article presents an integration of these two models as a means to study the evolution of social inequalities along distinct temporal dimensions. We apply the integrated model to survey data on subjective health status. We find substantial age, period, and cohort effects, as well as gender differences, not only for the conditional mean of self-rated health (i.e., between-group disparities), but also for the variance in this mean (i.e., within-group disparities)-and it is detection of age, period, and cohort variations in the latter disparities that application of the integrated model permits. Net of effects of age and individual-level covariates, in recent decades, cohort differences in conditional means of self-rated health have been less important than period differences that cut across all cohorts. By contrast, cohort differences of variances in these conditional means have dominated period differences. In particular, post-baby boom birth cohorts show significant and increasing levels of within-group disparities. These findings illustrate how the integrated model provides a powerful framework through which to identify and study the evolution of variations in social inequalities across age, period, and cohort temporal dimensions. Accordingly, this model should be broadly applicable to the study of social inequality in many different substantive contexts.     

中德职业教育教师准入机制比较研究

德国职业教育教师准入机制是德国职业教育制度的重要组成部分,对德国劳动者素质提高、产品质量提升及国民经济在国际上的持久竞争力起着极为重要的作用.本文通过对比分析中德职业教育教师准入资格、聘用程序、工作效果,提出了加强和改进我国职业教育教师队伍建设的思路和措施.     

The finite-time ruin probability in two non-standard renewal risk models with constant interest rate and dependent subexponential claims

This paper considers an ordinary renewal risk model and a compound renewal risk model with constant interest rate, subexponential claims and a general premium process. We derive some asymptotic results on the finite-time ruin probabilities.     

汉语口头交际中话语标记的功能分析

话语标记是口头交际中一种十分常见的话语现象,话语标记对话语的生成与理解起到引导和制约的作用。本文主要从话语组织功能和言语行为功能两个方面分析了汉语口头交际中常见的几种话语标记的使用情况。对话语标记的理解和掌握有助于对话语的表达和理解,有利于交际的顺利进行。     

污水处理中污泥的处置与利用

介绍和分析了我国污泥产生和处置利用的现状 ,比较了国内外采用的方法 ,并根据我国国情提出了污泥资源化、能源化的处置和利用途径的建议。     

一个小型企业生产管理信息系统的开发实践

本文通过一个小型企业生产管理信息系统的开发实践过程 ,着重探讨了小型企业在MIS建设的几个重要阶段中应注意的一些问题 ,认为在目前的技术条件下 ,这些问题是决定小型企业管理信息系统开发成败的主要因素 ,并结合实际提出了小型企业MIS建设的一些建议。     

90年代日本危机与日本文化诸模式

日本90年代的危机不仅与经济运行周期有关 ,而且与日本人的文化价值观、行为模式有直接的联系。本文从暧昧的责任体制、内外分明的集团主义文化、依赖性心理结构等方面对这场危机进行深层次探讨     

浅谈中专英语的课堂教学

当今时代是科学技术飞速发展的时代,大量新的科技成果层出不穷。学生只有掌握好外语,才能看到当今世界的科技发展,获取更多、更新的科技信息,为祖国建设做出贡献。面对这一形势,中专英语教学应更好地体现英语的工具性,把改革的重点放在发展学生的综合能力上。     

向阳化工业界龙头

营口向阳化工总厂是中国最大的聚烯烃催化剂生产厂家,1998年被国家科技部列入66户国家重点高新技术企业,1999年通过了ISO9002质量体系认证,是辽宁省AAA级信誉单位,是省高新技术企业、中科院化学所的实验基地.