Timing, Sequencing, and Quantum of Life Course Events: A Machine Learning Approach

In this paper we discuss and apply machine learning techniques, using ideas from a core research area in the artificial intelligence literature to analyse simultaneously timing, sequencing, and quantum of life course events from a comparative perspective. We outline the need for techniques which allow the adoption of a holistic approach to life course analysis, illustrating the specific case of the transition to adulthood. We briefly introduce machine learning algorithms to build decision trees and rule sets and then apply such algorithms to delineate the key features which distinguish Austrian and Italian pathways to adulthood, using Fertility and Family Survey data. The key role of sequencing and synchronization between events emerges clearly from the analysis. Billari F.C., Fürnkranz J., et Prskawetz A., 2006. Calendrier, séquence et intensitédes événements du cycle de vie : une application des techniques d’apprentissage par machine. Revue Européenne de Démographie, 22: 37–65     

‘Generation boomerang’ in Germany? Returning to the parental home in young adulthood

Leaving the parental home is not always a one-off event in the course of a person's life. Young adults can return one or more times before leaving home permanently. The aim of this article is to analyse the social and economic transition markers and socio-demographic factors which play a role in the return to the parental home of young adults in Germany. The analysis is based on the survey AID:A, conducted by the German Youth Institute in 2009. Data from 4300 young adults, aged 18–32 years, who left the parental home at least once, are used. Young adults are differentiated by their current residential status: living with at least one parent again (returners) or living outside the parental home (leavers). The results show that, the more financially and socially independent a young person is, the less likely they are to return to the family of origin. Furthermore, growing up in a two-parent family in West Germany as well as a strong relationship between fathers and sons increases the likelihood of returning to the parental home after leaving. Notably, it was also found that young adults of Turkish and Eastern European origin are more likely to return than those of German origin.     

The transition from college to work during the great recession: employment,financial, and identity challenges

This study examines the challenges that recent college graduates face in a hard-hit US region during the Great Recession. In their poignant and sometimes heartbreaking perceptions of their ‘biggest challenges,’ graduates vividly illustrate the negative implications of degree completion during the recession. Based on an analysis of both closed and open-ended survey data of Michigan's 2012 graduates, we find that women and first generation college graduates fare the worst in terms of their employment status, debt and income levels, and subjective assessments of job opportunities and financial stress. In contrast, men, especially those whose parents have at least a bachelor's degree, were more likely than their counterparts to report that their ‘biggest challenge’ since graduation was linked with making the transition into adult roles. Taken together, these findings suggest widespread difficulty after graduating from college during the Great Recession, and the ways in which these difficulties are linked with gender and class inequalities.     

Long‐Term Influences of Intergenerational Ambivalence on Midlife Parents' Psychological Well‐being

We investigated changes in midlife parents' intergenerational ambivalence toward a focal child and its influence on their psychological well‐being over 14 years, as the focal child moved from adolescence into young adulthood. We estimated growth curve models using three waves of data from the National Survey of Families and Households (N = 1,510 parents aged 35–54 years at Time 1). Parental ambivalence declined over time, equally among mothers and fathers. The prediction from ambivalence theory that children's attainment of adult statuses reduces parental ambivalence received only modest support. Only the focal child's marriage reduced parental ambivalence. The focal child's lifestyle–behavioral problems during adolescence still elevated ambivalence 14 years later, albeit less so. For its part, intergenerational ambivalence counteracted trends toward declining depressive symptoms and greater happiness for mothers and fathers alike, and its effects remained constant over time.     

汉语结构助词"的"书写形式之演变与分合

现代汉语中,助词"的"的书写形式在使用上比较混乱,从历时的角度描述其书写形式的演变过程,可以总结出其书写形式分合的原则:一是分写合写各自利弊如何,二是分写合写的约定俗成的情况如何.     

“Best-Laid Plans”: Barriers to Meeting Marital Timing Desires Over the Life Course*

Abstract

Most youth desire to marry, and often around a certain age, but many individuals marry earlier or later than originally desired. Off-time marriage could have consequences for subsequent relationship stability and mental health. Whereas barriers to marriage goals in the short term have been studied extensively, predictors of meeting marital timing expectations over the life course are less well understood. This study examined possible barriers, including socioeconomic characteristics and family experiences, both background and formation, to meeting marital timing desires by age 40 using data from the National Longitudinal Survey of Youth 1979 cohort (NLSY79). Multinomial logistic regression revealed that greater education, religiousness, cohabitation, and premarital childbearing were associated with delayed or forgone marriage, but associations varied by gender and the age at which respondents stated their expectations.     

Young people leaving care in Sweden

The transition from a placement in care to an independent life can be a problematic phase for young people. In Sweden, special care‐leaving services are almost non‐existent. What then happens to young people when they leave a placement in out‐of‐home care? This paper draws on the results of a study in which 16 young care leavers between the ages of 18 and 22 years were interviewed. Telephone interviews were also performed with the young care leavers' parents, social workers, foster carers and institutional staff. The aim of the study was to investigate how young care leavers perceive the transition from care to an independent life. The Swedish welfare model, the prolonged transition to adulthood and the family‐oriented welfare discourse have been used as analytical perspectives. The results show that young care leavers have a pronounced need for social, emotional, practical and financial support. Whilst such support is occasionally provided by foster carers and residential staff, it is seldom given by social services or biological parents. This group is at risk of facing severe problems in the transitional phase from care to independent life, a fact that is not acknowledged by the Swedish welfare system.     

刘少奇和邓小平的一大历史贡献——毛泽东思想的确立与再确立及其历史意义

刘少奇确立了毛泽东思想的指导地位 ,邓小平坚持了 (再确立了 )毛泽东思想的指导地位。随着国内局势的发展和国际局势的变化 ,越来越显示出邓小平的远见卓识、丰富的政治经验以及高超的领导艺术     

Does Marriage Moderate Genetic Effects on Delinquency and Violence?

Using data from the National Longitudinal Study of Adolescent to Adult Health (N = 1,254), the authors investigated whether marriage can foster desistance from delinquency and violence by moderating genetic effects. In contrast to existing gene–environment research that typically focuses on one or a few genetic polymorphisms, they extended a recently developed mixed linear model to consider the collective influence of 580 single nucleotide polymorphisms in 64 genes related to aggression and risky behavior. The mixed linear model estimates the proportion of variance in the phenotype that is explained by the single nucleotide polymorphisms. The authors found that the proportion of variance in delinquency/violence explained was smaller among married individuals than unmarried individuals. Because selection, confounding, and heterogeneity may bias the estimate of the Gene × Marriage interaction, they conducted a series of analyses to address these issues. The findings suggest that the Gene × Marriage interaction results were not seriously affected by these issues.     

Identifying Demographic and Attitudinal Correlates of Young Adults’ Safer-Sex Self-Efficacy

Objectives: Using data from young-adult college students (N = 207), we identified demographic and attitudinal correlates of safer-sex self-efficacy. Female respondents reported higher levels of safer-sex self-efficacy than males. Methods: Participants completed a self-report survey about their sexual attitudes, values, and experiences. Results: In regression analyses only, the importance of safer-sex practices was related to safer sex self-efficacy in both men and women. Women's safersex self-efficacy was associated with additional demographic factors and sexual beliefs. Conclusions: The factors identified in this study may serve as intervention targets for young-adult sexual health programs. Reinforcing the importance of safer-sex practices may be particularly effective in increasing young adults’ safer-sex self-efficacy.