Acculturation and Enculturation Trajectories Among Mexican‐American Adolescent Offenders

This study examines changes over time in ethnic affirmation/belonging and ethnic identity achievement, Spanish language use, English language use, Mexican/Mexican‐American affiliation/identification and Anglo affiliation/identification in a sample of Mexican‐American adolescents participating in a longitudinal study of juvenile offenders. The Multigroup Ethnic Identity Measure and the Acculturation Rating Scale for Mexican Americans‐II were completed by the Mexican‐American adolescents 7 times over a 3‐year period. The findings from longitudinal growth modeling analyses and growth mixture modeling analyses indicate that there is heterogeneity in the initial scores and changes over time on these variables that are related to markers for the cultural qualities of the home environment (i.e., generational status and mother's most frequent language use). In contrast to expectations, marginalized or assimilated acculturation trajectories/types were not overrepresented in this sample of adolescent offenders. Implications for our understanding of the nature of acculturation and enculturation processes and the way these processes are studied are discussed.     

Sexual orientation and household financial decisions: evidence from couples in the United States

We analyze how sexual orientation is related to household financial decisions using 2000 US Census data, and find that lesbian couples pay higher annual mortgages relative to house value than do heterosexual or gay couples. We also estimate that cohabiting heterosexuals pay more than their married counterparts. We link this homosexual-specific differential to homeowners’ propensity to save. This differential reflects the gender composition of same-sex households, and their very low fertility, in addition to the precautionary motives increasing cohabiting couples’ propensity to save relative to married ones. Evidence from retirement and social security income of older couples exhibits the same pattern of differentials by sexual orientation and cohabiting status.     

Random Bernstein Polynomials

Random Bernstein polynomials which are also probability distribution functions on the closed unit interval are studied. The probability law of a Bernstein polynomial so defined provides a novel prior on the space of distribution functions on [0, 1] which has full support and can easily select absolutely continuous distribution functions with a continuous and smooth derivative. In particular, the Bernstein polynomial which approximates a Dirichlet process is studied. This may be of interest in Bayesian non-parametric inference. In the second part of the paper, we study the posterior from a "Bernstein–Dirichlet" prior and suggest a hybrid Monte Carlo approximation of it. The proposed algorithm has some aspects of novelty since the problem under examination has a "changing dimension" parameter space.     

印度和中国——文明的和谐

特邀编者按:应中国共产党总书记胡锦涛同志的邀请,印度国大党主席索尼娅·甘地女士于2007年10月25日至29日访华.期间,胡锦涛总书记、温家宝总理亲切会见了她,就双边关系中的广泛话题展开了富有成效的、建设性的讨论.     

Risky Experiences for Children Online: Charting European Research on Children and the Internet

Children’s online experience, especially the risks to which they might be exposed, is an increasingly important policy and research concern. This article reports an analysis of the amount, nature and range of empirical research concerning children’s online experiences across 18 European countries. Research teams in each country have collaborated, as part of the ‘EU Kids Online’ network, to identify, code and compare studies. In all, 235 studies were identified and coded in a publicly accessible data repository. All countries had some available evidence regarding children’s online risky experiences, with strengths mainly in relation to research into access and use; several countries were found to have a richer evidence base encompassing research into online learning, literacy, participation, parental mediation and so forth. Regarding risks, more research focused on potentially harmful content than on risky forms of contact. Key research gaps included research on younger children, into mobile online platforms, and into certain types of online risk. The article concludes by observing the challenges facing researchers in this field, including the time‐sensitivity of research that quickly dates, the difficulty of tailoring research to meet the needs of a demanding policy agenda, the complexity of designing projects that recognise the contextual and contingent factors that mediate children’s online activities, and the ethical considerations that apply when asking children about private, transgressive or upsetting experiences.     

Effects of various types of change in shift schedules: A controlled longitudinal study

Abstract

Data from a longitudinal study accompanying changes in shift rotas connected with a shortening of working time in the chemical industry are presented. Altogether 260 subjects forming five experimental groups participated in both the pretest and the posttest. The effects of the change in shift schedules were controlled by the inclusion of five groups in which 139 subjects participated in both tests. Five types of change in shift schedule were investigated. The purpose was to determine to what extent similar, but in some aspects differing, types of change in shift schedule varied from one another in their effects on those involved, and on which factors their attitudes towards the new shift systems depended with regard to various types of schedule change. The effects of a change in shift schedule were tested by means of the 4-group investigation design developed by Solomon (1949). The results confirm that differences in the effects of new shift systems depend on the type of change. Only in three experimental groups were improvements in health and social life observed. One experimental group showed significant signs of deterioration in subjective health. In the analyses of the factors influencing the attitude of the shiftworkers towards the new shift system, differences in the structure of the influencing factors between the experimental groups were observed. The causal analysis was used in order to test how important the factors found in each group were and which of them were dominant. It showed that the most influential factors dominated so much that the disturbances in the less influential ones lost their importance. In spite of the number of indicators analysed regarding their influence on attitude in this study, further important factors seem to exist that have not been analysed here.     

On the Rapid Rise of Social Networking Sites: New Findings and Policy Implications

Social networking sites have been rapidly adopted by children and, especially, teenagers and young people worldwide, enabling new opportunities for the presentation of the self, learning, construction of a wide circle of relationships, and the management of privacy and intimacy. On the other hand, there are also concerns that social networking increases the likelihood of new risks to the self, these centring on loss of privacy, bullying, harmful contacts and more. This article reviews recent findings regarding children and teenagers' social networking practices in order to identify implications for future research and public policy. These focus on the interdependencies between opportunities and risks, the need for digital or media literacy education, the importance of building safety considerations into the design and management of social networking sites, the imperative for greater attention to 'at risk' children in particular, and the importance of a children's rights framework in developing evidence-based policy in this area.     

Non parametric mixture priors based on an exponential random scheme

We propose a general procedure for constructing nonparametric priors for Bayesian inference. Under very general assumptions, the proposed prior selects absolutely continuous distribution functions, hence it can be useful with continuous data. We use the notion ofFeller-type approximation, with a random scheme based on the natural exponential family, in order to construct a large class of distribution functions. We show how one can assign a probability to such a class and discuss the main properties of the proposed prior, namedFeller prior. Feller priors are related to mixture models with unknown number of components or, more generally, to mixtures with unknown weight distribution. Two illustrations relative to the estimation of a density and of a mixing distribution are carried out with respect to well known data-set in order to evaluate the performance of our procedure. Computations are performed using a modified version of an MCMC algorithm which is briefly described.     

Reconceptualising Social Exclusion: A Critical Response to the Neoliberal Welfare Reform Agenda and the Underclass Thesis

The application of free‐market principles to welfare reform in western industrialised nations is underpinned by contentious assumptions about human behaviour. In the postwar era, welfare policies largely considered disadvantage and exclusion as structural problems of the economy and society generally; disadvantaged individuals were considered ‘victims’ of their environment. More recently, conservative contributors have re‐emphasised disadvantage and exclusion as largely due to behavioural problems of the ‘undeserving poor’, manifest in what is believed to be an ‘underclass’. Critics of the current welfare reform agenda have voiced their concerns about the individualist assumptions that underpin it but their response to date is insufficient because they have generally neglected human agency and have failed to acknowledge individuals as capable actors. While there has been a revival of interest in human agency, greater recognition of agency in debates about welfare is required to mount a credible critique of the conservative assumptions about human behaviour in order to develop a more sensitive theory of the activities of the poor. One of the ways in which this may be achieved is by reconceptualising the concept of social exclusion and highlighting a ‘strong’ rather than a ‘weak’ version.     

Distribution system choice in a service industry: An analysis of international insurance firms operating in the United States

Service firms play an increasingly important role in the global economy. However, the internationalization strategies of such firms, and especially their distribution system choices, have been underexplored in the international management literature. One specific service industry that has internationalized rapidly in recent years is the insurance industry. This paper examines the determinants and performance implications of the choice by international insurance firms between two rival distribution systems: direct writing and independent sales agents. Drawing on the transaction cost theory-based literature on resource commitment, control, and risk, we develop hypotheses on the determinants of the choice between these two distribution systems and on the performance implications of this choice for insurance firms. Analyzing a sample of 168 distribution entries into the United States by insurance firms from six foreign countries over the 1992–2000 period, we find that cultural distance has a U-shaped effect on the probability of direct writing, and that an insurer's intangible assets have a positive effect on this probability. We also find that the direct writing system performs better in terms of profitability, but that the independent agency system performs better in terms of market share growth.