Inference and optimal design of multiple constant-stress testing for generalized half-normal distribution under type-II progressive censoring

The generalized half-normal (GHN) distribution and progressive type-II censoring are considered in this article for studying some statistical inferences of constant-stress accelerated life testing. The EM algorithm is considered to calculate the maximum likelihood estimates. Fisher information matrix is formed depending on the missing information law and it is utilized for structuring the asymptomatic confidence intervals. Further, interval estimation is discussed through bootstrap intervals. The Tierney and Kadane method, importance sampling procedure and Metropolis-Hastings algorithm are utilized to compute Bayesian estimates. Furthermore, predictive estimates for censored data and the related prediction intervals are obtained. We consider three optimality criteria to find out the optimal stress level. A real data set is used to illustrate the importance of GHN distribution as an alternative lifetime model for well-known distributions. Finally, a simulation study is provided with discussion.     

The Value of a Statistical Life for Risk‐Averse and Risk‐Seeking Individuals

This article estimates the value of a statistical life (VSL) for Chile under the hedonic wage method while accounting for individual risk preferences. Two alternative measures of risk aversion are used. First, risk aversion is directly measured using survey measures of preferences over hypothetical gambles, and second, over observed individual behaviors that may proxy for risk preferences, such as smoking status, are used. I reconcile the results with a theoretical model of economic behavior that predicts how the wage‐risk tradeoff changes as risk aversion differs across individuals. The VSL estimates range between 0.61 and 8.68 million dollars. The results using smoking behavior as a proxy for risk attitudes are consistent with previous findings. However, directly measuring risk aversion corrects the wage‐risk tradeoff estimation bias in the opposite direction. The results are robust to other observed measures of risk aversion such as drinking behavior and stock investments. Results suggest that, consistent with the literature that connects smoking behavior with labor market outcomes, smoking status could be capturing poor health productivity effect in addition to purely risk preferences.     

融合内容分析和关联分析的短生命周期体验品需求特征模式挖掘方法研究

挖掘特定产品的需求模式无法从整体掌握该类产品的市场特征；短生命周期体验品因缺乏历史销售数据，并且销售总量波动性极大，尤其需要从整体掌握销售总量与产品属性间关系的需求特征规律，但又难以挖掘，亟待提出适用于该类产品的需求特征模式挖掘方法。基于按销售总量分区后各区的需求特征的规律性，提出了一种按销售总量分区、以已有产品介绍集和销售总量为源信息、适用于新产品开发前使用、融合内容分析和关联分析的短生命周期体验品需求特征模式挖掘方法。该方法包括基于内容分析法的产品属性挖掘方法和基于关联分析的产品属性关系模式挖掘方法。前者可以得到较全面的产品属性；后者能够构建不同销售总量区间内产品集的属性关系模式，得到各区间的产品属性关系网，获得高销售总量区间具备，但中、低区间不具备的属性关系模式，从而获得需求特征模式。通过不断更新产品介绍集和销售总量并迭代挖掘，该方法能够动态挖掘需求特征模式。最后利用2013至2016年国产犯罪和爱情类电影数据验证了该方法的可行性，并得到了这两类电影的产品属性及近年的需求特征模式，可用于指导这两类电影的创作。     

Mothering and everyday life during and in the aftermath of domestic violence among women with immigrant backgrounds in Norway

This paper focuses on how immigrant women experience and negotiate their everyday life with children prior to and after leaving a violent partner. Twenty‐three women staying at domestic violence and abuse shelters with their children were interviewed about their experiences with assistance services and their everyday life with their children. At the time of the interviews, most of the women were legally separated or divorced and were either living in or in touch daily with shelters. In this paper, we look at some of the challenges that women face when exposed to violence in a relationship that involves children. Being exposed to violence from a partner raises a number of economic, practical, and emotional concerns, both prior to and after leaving. For the mothers in our study, maintaining a regular routine is key to making the children feel safe in an unpredictable setting. For many, economic dependence on the partner is replaced with economic dependence on assistance services after leaving the partner. Services must recognize that providing help to mothers who have left a violent partner constitutes more than just practical support but is crucial for mothers' ability to re‐establish a predictable everyday life with their children.     

《1844年经济学哲学手稿》与《神圣家族》中的生活思想

《1844年经济学哲学手稿》和《神圣家族》都是马克思主义创始人早期思想的代表性著作，二者都把“生活”作为重要概念进行论述。从作为经济学哲学概念到作为社会批判概念，马克思主义创始人对“生活”的认识经历了从对物质生产活动的重视到对无产阶级普遍贫困生活的揭露，从分析“生产生活”的异化到对“非人性”生活的批判，从“生活的手段”到消灭“非人性的生活条件”的思想历程。人类的历史是人类生活发展的历史。解决人的美好生活如何实现的问题，在马克思恩格斯的生活思想中居于核心地位，这对当今中国具有重要的理论指导价值。中国特色社会主义进入新时代，从开启一种全新文明的生活形态的高度来理解新时代的美好生活，才能准确把握我国社会主要矛盾变化的深刻意义。     

Childhood exposure to the Second World War and financial risk taking in adult life

Adverse childhood experiences might have long-lasting effects on decisions under uncertainty in adult life. Merging the European Survey on Health, Ageing and Retirement with data on conflict events during the Second World War, and relying on region-by-cohort variation in war exposure, we show that warfare exposure during childhood is associated with lower financial risk taking in later life. Individuals who experienced war episodes as children hold less – and are less likely to hold – stocks, but are more likely to hold life insurance, compared to non-exposed individuals. Effects are robust to the inclusion of potential mediating factors, and are tested for nonlinearity and heterogeneity. Moreover, we provide evidence of hedonic adaptation to war, as high and low intensity of war exposure have comparable long-term effects. We also document that war exposure in childhood increases sensitivity to financial uncertainty since exposed-to-war individuals are less likely to hold stocks after periods of high volatility. Finally, we shed light on the most likely mechanism in the relationship between war exposure and financial risk taking – i.e., enhanced sensitivity to uncertainty – and we show that preferences, and not beliefs, channel this relationship.     

Adverse childhood experiences,post-traumatic stress disorder symptoms,and self-reported stress among traditional and nontraditional college students

Abstract

Objective: To investigate the relationships between adverse childhood experiences (ACEs), post-traumatic stress disorder symptoms (PTSD-S), and self-reported stress among college students. Participants: A total of 236 undergraduate students enrolled in nursing courses participated. Method: Using a correlational design, participants completed questionnaires online. To examine PTSD moderation between ACE and self-reported stress, multiple regression was employed. Stress outcomes were examined using a 4-group variable. Mean differences in stress response between these four groups were examined. Differences in ACE, PTSD-S, and stress response between traditional and nontraditional students were also examined. Results: PTSD-S moderated the relationship between ACEs, and self-reported stress. This indicates that students who report PTSD-S following childhood adversity perceive higher levels of stress. Nontraditional and traditional students differed in their responses to the ICLRE scale. Conclusion: Individuals who report PTSD-S following childhood adversity perceive higher levels of stress later in life. Stress reduction programs may be beneficial for students.     

Relationship of sleep quality and attention deficit hyperactivity disorder symptoms with quality of life in college students

Abstract

Objective: Attention deficit hyperactivity disorder (ADHD) negatively influences various aspects of life such as social relations, adaptive skills, and occupation. In addition, many university students experience sleep problems, academic failure, and low quality of life (QOL). We investigated the relationship among ADHD symptoms, sleep quality, and QOL of college students, and identified the factors related to their QOL. Participants and Methods: Using a survey questionnaire, data were collected from 195 students from March–May 2017. Results: QOL of students was related to ADHD symptoms and sleep quality. Factors significantly associated with better QOL were fewer ADHD symptoms, good sleep quality, male sex, high academic performance, and high economic status. The explanatory power of these variables on QOL was 32.0%. Conclusion: To improve the QOL of college students, a multifaceted approach that includes assessment of ADHD symptoms and sleep quality is needed.     

Timing it right: Suspicious students,family bonds and becoming a woman in Quito,Ecuador

To improve access to education in Ecuador, state actors encourage parents and youth to think of girls’ emotional bonds to family as potential barriers to schooling. High schoolgirls and their mothers respond by synchronising their institutional and family responsibilities with the emotional norms of age grades such as ‘student youth’ and ‘mother’. Girls dedicated to embodying national progress find themselves trying to delay strong emotional commitments to family until after they have completed their schooling. Examining their construction as emotional suspects reveals the stakes of age expectations for female citizens in Ecuador.     

Uncovered and disrespected. A qualitative study of Jordanian women’s experience of privacy in birth

BackgroundPrivacy is related to a person’s sense of self and the need to be respected and it is a key factor that contributes to women’s satisfaction with their birth experiences.AimTo examine the meaning of privacy for Jordanian women during labour and birth.MethodA qualitative interpretive design was used. Data were collected through face-to-face semi-structured interviews with 27 Jordanian women. Of these women, 20 were living in Jordan while seven were living in Australia (with birthing experience in both Jordan and Australia). Thematic analysis was used to analyse the data.ResultsThe phrase ‘there is no privacy’ captured women’s experience of birth in Jordanian public hospitals and in some private hospital settings. Women in public hospitals in Jordan had to share a room during their labour with no screening. This experience meant that they were, “lying there for everyone to see”, “not even covered by a sheet” and with doctors and others coming in and out of their room. This experience contrasted with birth experienced in Australia.ConclusionsThis study explicates the meaning of privacy to Jordanian women and demonstrates the impact of the lack of privacy during labour and birth. Seeking a birth in a private hospital in Jordan was one of the strategies that women used to gain privacy, although this was not always achieved. Some strategies were identified to facilitate privacy, such as being covered by a sheet; however, even simple practices are difficult to change in a patriarchal, medically dominated maternity system.