年度报告的发布对买卖报价差日内变动模式的影响研究

针对上海这样一个指令驱动的股票市场,研究了年度报告的发布对买卖报价价差各组成成分日内变动模式的影响,旨在了解信息在中国股票市场的传播过程。研究结果表明年度报告作为中国投资者重要的信息来源,其发布改变了信息在投资者之间的分布格局,并且大部分投资者仍不成熟,对盈余信息的变化反应不够迅速。     

国际漫游资费逆向选择问题研究

针对当前国际漫游资费居高不下的情况,本文从国际漫游资费的结构出发,采用伯川德模型,提出国际漫游资费居高的原因是由于国际漫游批发价格不能反映被访运营商的市场需求,从而导致各运营商的机会主义行为.最后,提出如何消除这种信息不对称才能使国际漫游资费有效地降低.     

What changes in ‘parenting’ approaches occur over the course of adolescent foster care placements?

An overview of the parenting skills and strategies utilized by foster carers looking after adolescents was given in an earlier paper. This paper focuses specifically on the relationship between the behaviour of fostered adolescents and the quality of parenting provided by the carer. In particular, the paper considers the consequences of situations in which fostered young people have a detrimental impact on other children within the foster family, as this was an especially difficult situation for foster carers to manage. Similarly, foster carers appeared to find it difficult to maintain good parenting skills with young people who were at risk due to their own sexual behaviour although, conversely, caring for a young person whose sexual behaviour put others at risk was connected with improved parenting. The quality of parenting provided by the foster carers was also influenced by the level of stress they were experiencing, with increased levels of stress leading to poorer parenting of the fostered adolescent.     

Predictors of outcome for unrelated adoptive placements made during middle childhood

This paper reports on a follow‐up to adolescence of two longitudinal prospective studies of children placed from public care with non‐related adoptive families in the UK. Factors associated with outcome are presented for 99 children (one index child per adoptive family) who were between 5 and 11 years of age at placement. Information concerning the children's backgrounds and care histories was obtained shortly after placement (T1), from social workers. Adopters were interviewed at T1 and again at the end of the first year (T2). A further follow‐up was conducted an average of six years after placement (T3). Outcomes at T3 were classified as either disrupted, which was true for 23%, continuing and ‘positive’ (49%) or continuing but ‘difficult’ (28%). Bivariate analyses revealed a number of attributes, related to both the child and the adoptive parents, which were associated with differential outcomes. Logistic regression produced five predictors of placement disruption: age at placement, behavioural problems, preferential rejection, time in care and the child's degree of attachment to the new mother. Differences were found between ‘positive’ and ‘difficult’ outcomes in continuing placements as well as between continuing and disrupted placements. The analysis suggests that adoption should certainly be considered as an option for children over 5 years of age while recognizing the need for both preparation and post‐placement support. Evidence of differential outcome in continuing placements provides support for efforts to reduce the number of placements and returns home that a child at risk experiences.     

新形势下如何看待青年学生的逆反心理

本文分析了德育工作中青年学生逆反心理的成因,消极和积极作用,并对如何消除青年学生的逆反心理提出了建议和意见.     

Multivariate generalized linear mixed models with random intercepts to analyze cardiovascular risk markers in type-1 diabetic patients

Statistical approaches tailored to analyzing longitudinal data that have multiple outcomes with different distributions are scarce. This paucity is due to the non-availability of multivariate distributions that jointly model outcomes with different distributions other than the multivariate normal. A plethora of research has been done on the specific combination of binary-Gaussian bivariate outcomes but a more general approach that allows other mixtures of distributions for multiple longitudinal outcomes has not been thoroughly demonstrated and examined. Here, we study a multivariate generalized linear mixed models approach that jointly models multiple longitudinal outcomes with different combinations of distributions and incorporates the correlations between the various outcomes through separate yet correlated random intercepts. Every outcome is linked to the set of covariates through a proper link function that allows the incorporation and joint modeling of different distributions. A novel application was demonstrated on a cohort study of Type-1 diabetic patients to jointly model a mix of longitudinal cardiovascular outcomes and to explore for the first time the effect of glycemic control treatment, plasma prekallikrein biomarker, gender and age on cardiovascular risk factors collectively.     

Data-driven desirability function to measure patients’ disease progression in a longitudinal study

Multiple outcomes are increasingly used to assess chronic disease progression. We discuss and show how desirability functions can be used to assess a patient overall response to a treatment using multiple outcome measures and each of them may contribute unequally to the final assessment. Because judgments on disease progression and the relative contribution of each outcome can be subjective, we propose a data-driven approach to minimize the biases by using desirability functions with estimated shapes and weights based on a given gold standard. Our method provides each patient with a meaningful overall progression score that facilitates comparison and clinical interpretation. We also extend the methodology in a novel way to monitor patients’ disease progression when there are multiple time points and illustrate our method using a longitudinal data set from a randomized two-arm clinical trial for scleroderma patients.     

Advocacy Tactics and Policy Outcomes of Sex Offender Rights Organizations

Social movement organizations for sex offender rights work to reduce harm to registrants and their family members by influencing sex offender registration and community notification policies. This study draws on two theories of social movement organizations—organizational emergence and political opportunities—to investigate the capacity (i.e., structure, resources, knowledge and skills) of these organizations to bring about policy changes. Data were gathered using in-depth, telephone interviews with 19 leaders of state-level advocacy organizations in the United States. Two types of strategies emerged, distinguishing organizations as proactive or reactive in their approach to policy change. Proactive organizations contribute to policy amendment, development or adoption, whereas reactive organizations focus on blocking policy. These two types of organizations have similar tactical repertoires; however, more proactive organizations report the use of networking and coalition building and media stories, and more reactive organizations report the use of legislative testimony and research and policy analysis tactics. This study informs social work policy and practice by highlighting effective and ineffective tactics used by highly stigmatized advocacy organizations.     

A Community's Perceptions of Pediatric Social Outcomes in a Downsized Urban Hospital System

This article describes parental perceptions of pediatric services at Los Angeles County King/Drew Hospital and Medical Center after the hospital and its community clinics were restructured in the 1990s. Qualitative and quantitative measures are used to capture parental perceptions of service utilization, service convenience, and quality of care. The results are compared to hospital institutional operational data from patient flow analysis reports, appointment delay reports, and improving organizational performance committee reports. A comparison of parental perceptions of pediatric care is also made with findings from other post-devolution studies on access and quality of care at the Los Angeles County Department of Health Services. The implications of the findings for hospital quality assurance processes and health services outcomes research are discussed.     

A Group Work Experience with Mentally Retarded Adults on the Issues of Death and Dying

No abstract available for this article.