由现收现付制向基金制转轨的经济学分析

文章讨论了有关养老保险体系转轨的几个基本的经济学问题。首先从宏观经济运行的角度出发探讨了以下两个问题 :为什么要从现收现付制向基金制转轨 ?对于现阶段的中国来说马上向基金制转轨是否是最优的选择 ?文章还阐释了基金制下的收益率的决定因素并对基金制与现收现付制的风险因素进行了比较 ,最后对养老保险体系的改革提出了几点建议     

企业并购初期的组织结构设计与成本优化

本文研究了过渡结构在企业并购中的应用,并证明了过渡结构的应用使得企业并购体管理幅度隐性增大,从而降低组织成本。     

Intergenerational Mobility Modes and Changes in Social Class in Contemporary China

Using data from three China General Social Surveys, this paper analyzes changes in the basic situation of intergenerational mobility among social classes in China over the past 60 years. General social mobility was found to have increased, but social openness tended to show a wave-like pattern of change. Despite this, intergenerational inheritance was the main form of intergenerational mobility in every period. With the transformation of the socioeconomic system, the main mechanism of social exclusion changed from “systemic exclusion” to “market exclusion,” leading to changes in the structure of social opportunity. As a result, the form taken by intergenerational mobility varied significantly. This is chiefly evident in the gradual decline in the dominance of intergenerational inheritance among particular strata, with cross-class cyclical mobility becoming more difficult. On the one hand, changes in the social exclusion mechanism may increase social openness, making society more dynamic and strengthening social legitimacy. On the other hand, as the dominant class learns how to use market exclusion to achieve class reproduction, class solidification may still be possible in a future Chinese society.     

Qualitative exploration of supporting figures in the lives of emerging adults who left care compared with their noncare‐leaving peers

Studies on youth leaving care have emphasized their limited social support and their need for continuing support after emancipation. However, less is known about the nature of their existing social networks after emancipation and their roles during their transition to adulthood compared with their noncare‐leaving peers. With this in mind, 32 young adults aged 18 to 25 participated in semi‐structured interviews regarding their current support figures in order to learn whether they were congruent with their needs after emancipation. Thematic analysis revealed four main features of the two groups' social networks: (a) stability versus uncertainty as to the lasting presence of the supportive figure, (b) reliance on parents as main supportive figures versus relying on different supportive figures, (c) confidence versus uncertainty in the supportive figures' ability to help, and (d) holistic versus fragmented support of the young adults' needs. The discussion addresses the unique characteristics of care leavers in emerging adulthood and the implications of their social networks' features for their adjustment after emancipation. One of the study's recommendations is to proactively connect them to new supportive figures such as professionals or mentors by offering them mentoring programs cognizant of the instrumental and developmental tasks of emerging adulthood.     

Beyond the Preschool Years: Children’s Perceptions About Starting Kindergarten

This article describes a research study that investigated three‐ and four‐year‐old Canadian preschool children’s perceptions about starting kindergarten. Findings from 33 focus‐group discussions suggest that children begin to formulate ideas about starting kindergarten prior to school entry. Children’s responses were grouped according to three themes, play versus academic activities and homework; getting bigger but still needing help; and rules. Overall, the responses highlighted their expectations regarding continuity and discontinuity between the two environments. These findings support the position that children should be given the opportunity to contribute to the planning of transition practices.     

当代环境文化建设的理论变革及其发展趋势

人类的环境文化表征着人与自然之间相互关系变迁的整个过程。面对近现代以来被扭曲和异化的环境文化,当代环境文化正在进行理论变革。必须全面推进可持续发展战略,转变工业生产方式、经济增长模式和人们生活方式,从而建立起人与自然协同进化、促进环境公平和实现生态现代化的当代新型环境文化。     

Father's Migration and Leaving the Parental Home in Rural Mozambique

Migration is an increasingly common global phenomenon and has important implications for the well‐being of family members left behind. Although extensive research has examined the impact of parental labor migration on school‐age children, less is known about its effect on adolescents. In this study, the authors used longitudinal survey data collected in rural Mozambique (N = 515) to assess the association between father's migration and adolescent children's leaving the parental home, an important component of the transition to adulthood. The results showed that father's migration delays home‐leaving for adolescent girls and that these effects are not mediated by school enrollment. The results for boys were inconclusive. The authors also found that remittances and longer durations of paternal migration were negatively associated with the transition out of the home. On the basis of the findings, they argue that father's migration delays girls' marriage.     

Promoting healthy transition to college through mindfulness training with first-year college students: Pilot randomized controlled trial

Objective: Given the importance of developmental transitions on young adults' lives and the high rates of mental health issues among U.S. college students, first-year college students can be particularly vulnerable to stress and adversity. This pilot study evaluated the effectiveness and feasibility of mindfulness training aiming to promote first-year college students' health and wellbeing. Participants: 109 freshmen were recruited from residential halls (50% Caucasian, 66% female). Data collection was completed in November 2014. Methods: A randomized control trial was conducted utilizing the Learning to BREATHE (L2B) program, a universal mindfulness program adapted to match the developmental tasks of college transition. Results: Participation in the pilot intervention was associated with significant increase in students' life satisfaction, and significant decrease in depression and anxiety. Marginally significant decrease was found for sleep issues and alcohol consequences. Conclusions: Mindfulness-based programs may be an effective strategy to enhance a healthy transition into college.     

社会转型与少数民族价值观变迁:以西南地区为例

从西南少数民族历史发展进程来看,其生活环境相对封闭,从而对少数民族成员的自我与他者认同构成了影响,形成特定的制度体系、交往体系和价值体系。但随着改革开放和社会转型的推进,少数民族的价值观体系也发生了变化,具体表现在价值主体、价值运行以及身份认知三个层次上,它们共同促进了少数民族的认同序列重构。     

Earthquakes occurrences estimation through a parametric semi-Markov approach

The estimation of earthquakes’ occurrences prediction in seismic areas is a challenging problem in seismology and earthquake engineering. Indeed, the prevention and the quantification of possible damage provoked by destructive earthquakes are directly linked to this kind of prevision. In our paper, we adopt a parametric semi-Markov approach. This model assumes that a sequence of earthquakes is seen as a Markov process and besides it permits to take into consideration the more realistic assumption of events’ dependence in space and time. The elapsed time between two consecutive events is modeled as a general Weibull distribution. We determine then the transition probabilities and the so-called crossing states probabilities. We conclude then with a Monte Carlo simulation and the model is validated through a large database containing real data.