Defining the linear portion of a sigmoid‐shaped curve: bend points

Formulae are provided that define the ‘bend points’, the beginning and end of the essentially linear dose–response region, for the four‐parameter logistic model. The formulae are expressed in both response and dose units. The derivation of the formulae is shown in order to illustrate the general nature of the methodology. Examples are given that describe how the formulae may be used while planning and conducting bioassays. Copyright © 2003 John Wiley & Sons, Ltd.     

传统婚姻家庭观的反叛与重塑——试析当代大学生婚姻家庭观念的嬗变

改革开放后的中国正处于社会转型期,物质和精神领域都在发生着巨大的变化。当代大学生是在社会转型时期成长起来的一代,透过他们的婚姻家庭现可以折射出这个时代的特征,某种程度上也可以反映出未来相当长的一段时期内中国知识分子阶层中婚姻家庭的状况和趋势。     

对我国城市女性遭遇家庭暴力问题的再思考

从社会普遍关注的城市女性遭遇家庭暴力这个视角出发,分析和归纳了城市女性家庭暴力的含义、特征、危害,揭示了城市女性家庭暴力问题产生的主要原因,提出了预防和制止城市女性家庭暴力的对策和建议。     

Making the Best of a Bad Job? Female Part‐Timers’ Orientations and Attitudes to Work

This article uses data from 50 qualitative interviews with female part‐time workers in low‐level jobs in Britain to illustrate their attitudes, orientations and aspirations towards paid work. The research reports two main findings. Firstly, even female part‐time workers at the bottom end of the occupational structure are not a homogeneous group of workers. Secondly, they are not all highly satisfied with their jobs. The article argues that many women (especially those in working‐class households) still do not have a genuine choice between ‘family work’ and ‘market work’. It concludes by presenting a theoretical model of orientations to work.     

On the preservation of copula structure under truncation

The author characterizes the copula associated with the bivariate survival model of Clayton (1978) as the only absolutely continuous copula that is preserved under bivariate truncation.     

An evaluation of the childhood family structure measures from the sixth wave of the British Household Panel Survey

Summary.  The paper performs an evaluation of the data that were collected in the sixth wave of the British Household Panel Survey (BHPS) on childhood family structure. After comparing such data with a large number of studies by using external sources, we find that the BHPS data overestimate the proportion of people who report an experience of life in a non-intact family during childhood by about 10%. Although an explanation based on recall error that deteriorates with the age of the BHPS respondents is possible, the overestimation is likely to be accounted for by non-ignorable attrition that may affect most of the comparison studies based on longitudinal data. Conversely, comparisons with other independent measurements from the BHPS itself reveal that the wave 6 data underestimate the proportion of young people who have lived at least part of their childhood in a non-intact family by about 8%. The probability of disagreement between these two sets of measures is strongly associated with poor interview characteristics, which may affect the comparison measure more than the wave 6 measure. Despite such differences, there is therefore a substantial degree of similarity between the family structure information that was collected in the sixth wave of the BHPS and the host of highly diverse records against which it has been compared.     

历史小说：在家庭文化的认同与互动之间

家庭文化对于历史小说家的审美趣味和历史观念具有重要影响,家学传统给予历史小说家的文化熏陶对于历史小说写作具有重要意义,情感的苦乐体验使作家对历史小说如何以史鉴今重塑中国文化和民族精神有着独特理解,但家庭文化的负面因素也造成了历史小说的缺憾和不足。     

Using a computer simulation game to teach family time use concepts

A computer simulation game designed to give students insights into family time use concepts has been used in an introductory family resource management class at Ohio State University and other universities. The game allows for planning for time use changes over the family life cycle. The game can give students insights into economic and sociological models of time use. It is possible that future versions of the game could be used in family counseling.His research interests include derivation of optimal decision-making rules for families and family financial management.Her research interests include financial management over the life course including financial ratios, baby boomers, and retirement. She received her Ph.D. in 1993 from The Ohio State University in Family Resource Management.His research interests include the time trade-offs made between couples, financial planning over the life cycle, and the interaction of time and money between families and their home-based businesses. He received his Ph.D. in 1993 from The Ohio State University in Family Resource Management.     

我国婴幼儿托育服务标准规范体系的现状及其优化研究

近年来,我国婴幼儿托育服务标准规范建设进程较快,当前体系框架已初步建立。但由于长期以来标准规范建设比较缓 慢、推进机制不健全等客观因素制约,当前婴幼儿托育服务在通用基础标准规范方面整体滞后,婴幼儿安全照护和权益保障标准 规范方面仍存短板,监管和人员标准规范方面较弱等问题。根据托育标准规范体系现状,结合托育服务发展需求,当前亟需建立 托育服务标准规范体系的协同推进工作机制,加快通用基础标准规范研制,促进服务提供标准规范的健全,补足支持保障标准规 范的短板,进而完善标准规范框架体系,推动各类标准规范的兼容,进而为婴幼儿托育服务高质量发展提供支持和保障。     

Generalized Leverage and its Applications

The generalized leverage of an estimator is defined in regression models as a measure of the importance of individual observations. We derive a simple but powerful result, developing an explicit expression for leverage in a general M -estimation problem, of which the maximum likelihood problems are special cases. A variety of applications are considered, most notably to the exponential family non-linear models. The relationship between leverage and local influence is also discussed. Numerical examples are given to illustrate our results