Estimation and inference for exponential smooth transition nonlinear volatility models

A family of threshold nonlinear generalised autoregressive conditionally heteroscedastic models is considered, that allows smooth transitions between regimes, capturing size asymmetry via an exponential smooth transition function. A Bayesian approach is taken and an efficient adaptive sampling scheme is employed for inference, including a novel extension to a recently proposed prior for the smoothing parameter that solves a likelihood identification problem. A simulation study illustrates that the sampling scheme performs well, with the chosen prior kept close to uninformative, while successfully ensuring identification of model parameters and accurate inference for the smoothing parameter. An empirical study confirms the potential suitability of the model, highlighting the presence of both mean and volatility (size) asymmetry; while the model is favoured over modern, popular model competitors, including those with sign asymmetry, via the deviance information criterion.     

The school community council: creating an environment for student success

A model of community-school partnerships is developing within a school district in Evansville, Indiana. Based on a full-service community school philosophy, the model started in one elementary school in the Evansville-Vanderburgh School Corporation and has expanded into a districtwide initiative called the School Community Council. The council is made up of over seventy community organizations and social service agencies working together to establish full-service schools as places of community and to enhance youth and family development.     

Women in steel: The case of Ciudad Guayana,Venezuela

This paper analyzes the incorporation of women into heavy industry during the Ciudad Guayana employment boom of 1974–1979 and the reduction in female employment during the post-boom period. The first and second sections outline the features of female incorporation at a specialty steel plant and the state-owned steel mill. The third section describes the discrimination to which two groups of women, day laborers and engineers, were subjected. The fourth analyzes the response of women to discrimination.The study suggests that male discriminatory behavior and female coping mechanisms result from the interaction of gender roles and stereotypes on the one hand, and institutional/structural factors on the other. Discriminatory practices and women's responses to them are mediated by class and age differences. These are shaped by the individuals' prior experiences and the historical context in which discrimination evolved.     

Meeting the Needs of Visually Impaired People Living in Lifetime Homes

ABSTRACT

This article explores perceptions on the suitability and effectiveness of Lifetime Homes standards (LTHS) for those with visual impairment in Northern Ireland. LTHS are a series of mandatory United Kingdom public-sector housing design interventions, providing a model for ensuring accessible and adaptable homes throughout an occupant's life span. An aging demographic with increasing incidence of diabetes has led to rising numbers of elderly, visually impaired people wanting to remain in their homes for longer. Qualitative semi-structured interviews were conducted with 13 key stakeholders and thematically analyzed. Although findings show that employing LTHS offers benefits to visually impaired residents, shortcomings were also identified. Evidence indicates a need for policy makers, health-care professionals, and housing associations to modify practices to better meet the housing needs of visually impaired people. Findings may also be applicable to those with other impairments and disabilities in relation to housing for elderly residents.     

An Examination of Risky Drinking Behaviors and Motivations for Alcohol Use in a College Sample

Abstract

Objective: The current study examined (1) drinking motives as a mediator of risky drinking behaviors (ie, pregaming and drinking games) and alcohol-related problems and (2) whether gender moderates the association between risky drinking behaviors and negative consequences. Participants: Participants (N = 368; 68% female) were drinkers aged 18 to 25. Data were collected from September to November 2010 and January to May 2011. Methods: Participants completed measures regarding typical pregaming and drinking game alcohol consumption, drinking motives, and alcohol-related consequences. Results: Social, coping, and enhancement motives partially explained relationships, with enhancement motives explaining the most variance for pregaming (31%) and drinking games (44%). Relationships between risky drinking and consequences were not moderated by gender. Conclusions: Drinking to enhance positive affect may be the most salient motivation for drinking related to pregaming and drinking games for college drinkers. Findings have implications for interventions tailored to students engaging in various heavy drinking practices.     

‘How Much Do You Spend Gambling?’: Ambiguities in Questionnaire Items Assessing Expenditure

Expenditure is a dependent variable frequently used in gambling research to index involvement and intensity. However, as a previous study found, self-reported expenditure estimates are ambiguous and imprecise. This paper attempts to (a) replicate the original study, and (b) investigate if specific instructions on methods used to calculate expenditure lead to differences in reported estimates in response to the question, ‘How much money do you spend gambling?’ A total of 637 participants were randomly assigned to one of three groups: Group 1 with no instructions; Groups 2 and 3 with instructions on calculating net and turnover. Results revealed that when heuristics were not specified, half the sample used net expenditure and the remainder used turnover. When heuristics were clearly specified, 30% failed to comply with instructions in calculating estimates. Results undermine the validity of reported gambling expenditure data and support the need for clear instructions on methods used to calculate expenditure.     

Investigating non-gamblers: another step toward identifying potential protective factors against problem gambling

In this article it is argued that knowing more about non-gamblers could help researchers discover novel protective factors against problem gambling. The purpose of this study was to therefore to identify the sociodemographic, psychological and behavioural characteristics that are more prevalent among non-gamblers than among gamblers. Results from a logistic regression analysis with a representative sample of adults in the province of Quebec (Canada) revealed 12 significant predictors of non-gambling status. Among these predictors, seven were sociodemographic variables (i.e. birthplace, mother tongue, childhood religion, civil status, education, family income and family history of gambling problems), four were psychological variables (i.e. perception of one's financial situation relative to others, optimism concerning one's financial situation, beliefs concerning chances of winning, and suicidal ideation) and one variable was behavioural (i.e. church attendance). Further research including different types of variables and a common operational definition of non-gamblers is necessary to better understand this subgroup and its potential for possessing protective factors against gambling problems.     

Missing Data: A Comparison of Online and Classroom Data Collection Methods With Social Work Students

ABSTRACT

Missing data (item nonresponse) is prevalent in survey research and likely regardless of the researcher's efforts. Problems associated with missing data include but are not limited to low statistical power, biased results, and limited external validity. The present study compared online (n = 125) and classroom (n = 74) data collection methods to determine the extent of missing data between the two cohorts. The total sample consisted of 199 master's of social work and bachelor's of social work students, each of whom were asked to respond to 91 survey items (the majority of which pertained to research in social work practice). A logistic regression model demonstrated a significant relationship between the total number of completed survey items and the data collection methods. The study shows an empirical association between the classroom data collection method and the lower levels of missing data. Study limitations are discussed, and recommendations for future research are made.     

Jealousy and Couple Satisfaction: A Romantic Attachment Perspective

The overarching objective of this study was to examine a novel model investigating romantic attachment as a moderator of the relation between an individual's jealousy or an individual's perception of his or her partner's jealousy and one's couple satisfaction. The sample comprised of 502 university students currently involved in a relationship of at least 12 months. An original and comprehensive model concurrently investigating emotional, cognitive, and behavioral facets of jealousy was used. The implementation of hierarchical models revealed that cognitive jealousy was negatively associated with couple satisfaction, whereas emotional jealousy demonstrated a positive association; behavioral jealousy did not add incremental value in one's couple satisfaction. Results were applicable to both one's own and one's perception of his or her partner's jealousy for each respective facet. Cognitive jealousy was demonstrated to explain the greatest variance in one's couple satisfaction. Findings also revealed romantic attachment as a moderator of the relation between certain facets of jealousy and couple satisfaction, with attachment anxiety and avoidance leading to a strengthened or weakened relation, respectively. As such, results suggest that the negative and positive consequences of jealousy on couple satisfaction may be exacerbated among those exhibiting higher attachment anxiety. The applied and clinical implications of all findings are discussed.