The exact risks of some pre-test and stein-type regression estimators umder balanced loss

In regression analysis we are often interested in using an estimator which is “precise” and which simultaneously provides a model with “good fit”, In this paper we consider the risk properties of several estimators of the regression coefficient vector "trader “balanced” loss, This loss function (Zellner, 1994) reflects both of the described attributes. Under a particular form of balanced loss, we derive the predictive risk of the pre-test estimator which results after a test for exact linear restrictions on the coefficient vector. The corresponding risks of Stein-rule and positive-part Stein-rale estimators are also established. The risks based on loss functions which allow only for estimation precision, or only for goodness of fit, are special cases of our results, and we draw appropriate comparisons, In particular, we show that some of the well-known results under (quadratic) precision-only loss are not robust to our generalization of the loss function     

Is consanguinity an impediment to child development?

Marriages between blood relatives—also known as consanguineous unions—are widespread in North Africa, Central and West Asia, and South Asia. Researchers have suggested that consanguinity has adverse effects on child development, but assessing its impact is not straightforward, as the decision to marry a relative might be endogenous to other socio-economic factors. Using a unique data set collected in rural Pakistan, this paper assesses the extent to which consanguinity is linked to children’s cognitive and physical development. It exploits grandfathers’ land ownership (current and past) and maternal grandparent mortality to identify the effect of endogenous consanguinity on child development. Children born into consanguineous unions have lower cognitive scores, lower height-for-age, and a higher likelihood of being severely stunted. More importantly, adverse effects are greater after accounting for the endogeneity of consanguinity, suggesting that impacts on child development are substantial, and likely to be larger than suggested in previous studies.     

Mediating Role of Psychological Capital in the Relationship between Social Support and Wellbeing of Refugees

This study examines the relationship between social support from work and non‐work domains and the wellbeing of refugee employees. In addition, it examines the mediating influence of psychological capital on these relationships. Using data from 190 refugee employees living in Australia, we find that while perceived organizational support and perceived family support are positively related to the wellbeing of refugee employees, the relationship between perceived supervisor support and wellbeing is not significant. Additionally, while we find that PsyCap fully mediates the relationship between perceived organizational support and wellbeing, it only partially mediates the relationship between perceived family support and wellbeing.     

Functional principal component analysis of spatially correlated data

This paper focuses on the analysis of spatially correlated functional data. We propose a parametric model for spatial correlation and the between-curve correlation is modeled by correlating functional principal component scores of the functional data. Additionally, in the sparse observation framework, we propose a novel approach of spatial principal analysis by conditional expectation to explicitly estimate spatial correlations and reconstruct individual curves. Assuming spatial stationarity, empirical spatial correlations are calculated as the ratio of eigenvalues of the smoothed covariance surface Cov\((X_i(s),X_i(t))\) and cross-covariance surface Cov\((X_i(s), X_j(t))\) at locations indexed by i and j. Then a anisotropy Matérn spatial correlation model is fitted to empirical correlations. Finally, principal component scores are estimated to reconstruct the sparsely observed curves. This framework can naturally accommodate arbitrary covariance structures, but there is an enormous reduction in computation if one can assume the separability of temporal and spatial components. We demonstrate the consistency of our estimates and propose hypothesis tests to examine the separability as well as the isotropy effect of spatial correlation. Using simulation studies, we show that these methods have some clear advantages over existing methods of curve reconstruction and estimation of model parameters.     

Urban multiculture and everyday encounters in semi‐public,franchised cafe spaces

This paper engages with an emergent literature on multiculture and concepts such as conviviality and negotiation to explore how increasingly ethnically diverse population routinely share and mix in urban places and social spaces. As part of a wider ESRC funded, two‐year qualitative study of changing social life and everyday multiculture in different geographical areas of contemporary England, this paper draws on participant observation data from three branches of franchised leisure and consumption cafe spaces. We pay particular attention to the ways these spaces work as settings of encounter and shared presence between groups often envisaged as separated by ethnic difference. Our findings suggest that corporate spaces which are more often dismissed as commercial, globalized spaces of soulless homogeneity can be locally inflected spaces whose cultural blandness may generate confident familiarity, ethnic mixity, mundane co‐presence and inattentive forms of conviviality.     

Preschoolers' Beliefs About the Stability of Antisocial Behavior: Implications for Navigating Social Challenges

The relation between 3‐ to 5‐year‐old children's beliefs about sociomoral stability (the tendency for antisocial behavior to remain stable over time) and their reasoning about peer interactions was examined. Participants were 100 preschoolers enrolled in a Head Start program. Children who endorsed sociomoral stability beliefs were less likely than their peers to make prosocial inferences, were rated by their teachers as less likely to engage in prosocial behavior, and were more likely to endorse the use of aggression to solve conflict with peers. These findings suggest that as early as preschool, children have general patterns of beliefs about the stability of antisocial behavior that predict a tendency to de‐emphasize prosocial strategies that can mediate social challenges.     

Vietnam as a class war: Myth or reality?

This article reports an extension of the analyses of the fatalities in the Vietnam War presented by Barnett, Stanley, and Shore (1992) as printed in the September‐October 1992 Operations Research. The additional analyses involved an examination of results by Barnett et al. in numeric as well as percentage form and a consideration of how the revised analyses generalize to the population of all American fatalities in Vietnam. These analyses yielded a different conclusion about the role of economic class in the fatalities in the Vietnam War than those drawn by Barnett et al. They suggested that the term class war was not supported by their data analyses. Our analyses indicate that their conclusion is incorrect. The lower class sacrificed considerably more lives than the upper class.     

Evaluation of the All Stars Program: student and teacher factors that influence mediators of substance use

The authors examined the relationship between students' perceptions of a problem behavior prevention program, All Stars, and changes in the program variables. Three factors--Program Enjoyment, Student Engagement, and Teacher Relationship--were used to predict changes in the four variables targeted by the All Stars program. Student Engagement was related to greater changes in student idealism, commitment, and bonding. Program Enjoyment was related to positive changes in student idealism and normative beliefs. Teacher Relationship had little impact on the program variables. Students who were taught All Stars by regular classroom teachers reported greater Program Enjoyment and Student Engagement than students taught by health education specialists.     

Gambling and Problem Gambling among Recently Sentenced Male Prisoners in Four New Zealand Prisons

Recently sentenced inmates in four New Zealand male prisons (N = 357) were interviewed to assess their gambling involvement, problem gambling and criminal offending. Frequent participation in and high expenditure on continuous forms of gambling prior to imprisonment were reported. Nineteen percent said they had been in prison for a gambling-related offence and most of this offending was property-related and non-violent. On the basis of their SOGS-R scores, 21% were lifetime probable pathological gamblers and 16% were probable pathological gamblers during the six months prior to imprisonment. Of the “current” problem gamblers, 51% reported gambling-related offending and 35% had been imprisoned for a crime of this type. Gambling-related offending increased with problem gambling severity. However, only five percent of problem gamblers said their early offending was gambling-related. The large majority reported other types of offending at this time. Few men had sought or received help for gambling problems prior to imprisonment or during their present incarceration. This highlights the potential for assessment and treatment programs in prison to reduce recidivism and adverse effects of problem gambling and gambling-related offending.