Likelihood procedure for testing changes in skew normal model with applications to stock returns

The skew normal distribution family is an attractive distribution family due to its mathematical tractability and inclusion of the normal distribution as the special case. It has wide applications in many applied fields such as finance, economics, and medical research. Such a distribution family has been studied extensively since it was introduced by Azzalini in 1985 Azzalini, A. (1985). A class of distributions which includes the normal ones. Scandinavian Journal of Statistics 12:171–178. [Google Scholar] for the first time. Yet, few work has been done on the study of change point problem related to this distribution family. In this article, we propose the likelihood ratio test (LRT) to detect changes in the parameters of the skew normal distribution associated with some asymptotic results of the test statistic. Simulations have been conducted under different scenarios to investigate the performance of the proposed method. Comparisons to some other existing method indicate the comparable power of the method in detecting changes in parameters of the skew normal distribution model. Applications on two real data: Brazilian and Tanzanian stock returns illustrate the detection procedure.     

What mental health professionals in Israel know and think about adolescent problem gambling

Mental health professionals are well versed in addressing multiple adolescent risky behaviours and play a primary role in the identification of and referral process and service provision for young people who engage in such behaviours. Given their ‘person-in-environment’ approach, training in multi-sectoral collaboration, and awareness of social policies, social workers are especially equipped to provide needed mental health services to young people. The aim of the current study was to examine Israeli mental health professionals’ awareness of and attitudes towards adolescent high-risk behaviours, including gambling. Child psychologists, social workers and school counsellors (N = 273) completed an online survey addressing concerns related to high-risk behaviours. Findings revealed that social workers perceived gambling as being among one of the least concerning adolescent mental health issues and reported feeling the least confident in their abilities to provide services to young people with gambling problems. The results suggest the importance of youth gambling addictions being incorporated into social work training curricula.     

社会工作专业教学组织机制：问题与选择

优化教学组织机制是提高社会工作专业教育质量不可或缺的重要一环。面对社会工作专业课堂教学和实践教学他组织与自组织相分离的现实困境,教师要科学选择介入策略,勇于革新教学方法,以实现教学组织机制的优化。     

社会角色理论视域下高校问题学生行为失范

高校"问题学生"行为失范已得到社会的普遍关注,基于前人研究的基础,立足客观实际,开辟新视角,将社会角色理论引入对这一问题的研究,不仅对"问题学生"和"行为失范"进行了重新界定,从角色转换、角色冲突、角色错位、角色失败四个方面分析了高校"问题学生"行为失范产生的缘由,并提出了相应的对策。     

SOCIAL WORK EDUCATION: THE AVAILABILITY OF ALCOHOL‐RELATED COURSE CURRICULUM AND SOCIAL WORKERS' ABILITY TO WORK WITH PROBLEM DRINKERS

An explanatory cross‐sectional investigation was employed to assess how well masters‐level social work (MSW) programs in the State of New York prepare students for practice with problem drinkers. The following areas were explored: (1) the incorporation of alcohol‐related coursework and field placement opportunities within MSW programs; (2) the relationship between students' completion of alcohol‐related courses and field placements and their subsequent ability to diagnose clients with alcohol problems, their willingness to work with problem drinkers, and their levels of alcohol‐related knowledge; and (3) subjects' levels of alcohol‐related knowledge in relation to their diagnostic ability and their willingness to work with problem drinkers. The sample consisted of 89 MSW‐level social work practitioners, who were active members of the New York State Chapter of the National Association of Social Workers (NASW) during the fall of 2005. Fewer than 3% of the sample reported the completion of an alcohol‐related course as a mandatory degree requirement and only 29.5% of the sample acknowledged the completion of an alcohol‐related field placement. These findings suggest that a possible gap exists in what social workers are being taught and what they need to know to successfully work with problem drinkers. The findings indicate that clients with alcohol problems are at risk of going untreated due to social workers' inability to correctly diagnose them as a result of insufficient training in the area of alcohol studies.     

Pathways of disadvantage: Explaining the relationship between maternal depression and children’s problem behaviors

A large body of literature documents that children of depressed mothers have impaired cognitive, behavioral, and health outcomes throughout the life course, though much less is known about the mechanisms linking maternal depression to children’s outcomes. In this paper, I use data from the Fragile Families and Child Wellbeing Study to estimate and explain the consequences of maternal depression for 5-year-old children’s internalizing and externalizing problem behaviors. Ordinary least squared (OLS) regression models and propensity score models show that children exposed to both chronic and intermittent maternal depression have more problem behaviors than their counterparts with never depressed mothers. Results also show that economic resources and maternal parenting behaviors mediate much of the association between maternal depression and children’s problem behaviors, but that relationships with romantic partners and social support do little to explain this association. This research extends past literature by illuminating some mechanisms through which maternal depression matters for children; by utilizing longitudinal measures of depression; by employing rigorous statistical techniques to lend confidence to the findings; and by using a large, diverse, and non-clinical sample of children most susceptible to maternal depression. Given that early childhood problem behaviors lay a crucial foundation for short- and long-term life trajectories, the social consequences of maternal depression may be far-reaching.     

后现代视野与文学经典问题域的新问题

本文以我国文学经典问题域业已形成为基本判断,全面和历史性地梳理了其形成原因和过程,分析了问题域中诸问题之间的逻辑关系,目前面临的研究困境等。籍此提出文学经典重读的问题,旨在从文学经典现象和重读主体实践活动角度,从该问题的界定、研究目的和重读对象的确定等基本方面做了交代。最后,提出文学经典重读问题需要置于现代与后现代相互交融的"思考和感觉方式"中。     

湖南省区域中心城市发展中的人口问题研究——以长株潭城市群为例

基于长株潭城市群人口发展现状,利用相关人口指标与武汉、广州等经济发达城市相比较,表明长株潭城市群在人口规模、行业人口结构及人口质量等方面存在一些问题,并提出促进城市发展的人口对策。     

试析语感研究的现状及存在的问题

从语感研究的现状看,关涉语感本身的理论问题得到了比较深入的研究,也取得了很多成果。同时,语感作为我国第八次课程改革《语文课程标准》的核心词汇之一,语感培养问题开始真正走进人们的思维视阈。由于现实上语感实践环节的研究相对薄弱,从而造成语感教学实践成为目前语感研究面临的最大问题,其中既包括语感教学实施也包括切合实际的语感评价指标体系建立。     

论“问题学生”的成因与教育转化

近年来,大学中的"问题学生"逐渐成为各学校学生工作的一个重点.文章从家庭、学校、社会及学生自身等角度分析了"问题学生"产生的原因,并提出了一系列的教育转化措施,旨在杜绝"问题学生"形成的根源,使大学中的"问题学生"不断减少,努力为我们的社会造就成千上万新型的、高素质的人才.