Detection of outliers in simple circular regression models using the mean circular error statistic

The investigation on the identification of outliers in linear regression models can be extended to those for circular regression case. In this paper, we propose a new numerical statistic called mean circular error to identify possible outliers in circular regression models by using a row deletion approach. Through intensive simulation studies, the cut-off points of the statistic are obtained and its power of performance investigated. It is found that the performance improves as the concentration parameter of circular residuals becomes larger or the sample size becomes smaller. As an illustration, the statistic is applied to a wind direction data set.     

The Role of Organizational Size and Industry in Job Quality and Work-Family Relationships

In this study we update analyses of the 1977 QES (Zipp, 1991) using data from the 1997 National Study of the Changing Workforce. We use hierarchical linear modeling procedures to partition the variance in a wide variety of indicators of workers' experiences. Most variation was associated with the individual level of analysis, but significant and nontrivial variation also was associated with the organizational and industrial levels. Although workers in smaller organizations reported lower earnings, fewer benefits, and less education than their counterparts in larger organizations, they also reported experiencing less discrimination, better fit between their actual and desired work hours, more supportive work environments and loyalty to their employers, less burnout or interference between work and family, and shorter commute times.     

"Bridging the Gap": New Relationships between Primary Care Groups and Local Authorities

Current policy places great emphasis on the development of "partnerships", particularly between NHS and local authority services, with the aims of increasing service coordination and delivery and improving health. To this end, primary care groups (PCGs), at the forefront of NHS organizational developments, are required to include a social services representative on their governing boards; similarly, primary care trusts (PCTs) have a social services representative on their executive committees. Drawing on a representative longitudinal national survey of English PCGs, the paper evaluates the contribution of these new governance arrangements to the development of inter-agency partnerships. Despite poor histories of collaboration and some major organizational barriers, there are some signs of progress, with social services representatives playing an active part in PCG affairs and having clear lines of communication about PCG matters with their employing authorities. Equally significantly, PCGs have also quickly established a wide range of contacts directly with other local authority services and departments. However, these early gains risk being limited by traditional professional inequalities between social work and medicine and, in particular, by the prospect of further organizational upheaval as PCGs merge with each other and/or acquire trust status.     

A managerial approach to environmental assessment

The external environment of a corporation is one of the major determinants of its strategy. While this view is readily accepted, the tools to monitor this important determinant are still relatively underdeveloped. The authors have developed a managerial process which fills this gap by enabling an organization to assess its external environment effectively and economically. The approach helps executives identify major forces for strategic change in the market and non-market dimensions of the environment. The relevance of these changes is determined by measuring their impact on the mission and the strategies of the company. The process, furthermore, provides a starting point for assessing an organization's capabilities to respond to these forces for change.     

Social Support Networks and School Outcomes: The Centrality of the Teacher

This investigation compares school outcomes for students who differ in the extent to which they perceive their parents, friends, and teachers—each alone and in combination—as important sources of social support. Findings indicate that middle and high school students who perceive high supportiveness from all three sources of support, as opposed to none, one, or two, have better attendance; spend more hours studying; avoid problem behavior more; have higher school satisfaction, engagement, and self-efficacy; and obtain better grades. Positive school outcomes are promoted when teacher support is perceived in combination with perceived support from parents and friends. Implications of the results for human service providers are presented.     

DEMAND/WITHDRAW INTERACTION PATTERNS BETWEEN DIFFERENT TYPES OF BATTERERS AND THEIR SPOUSES

The investigation of subtypes of violent men could provide invaluable information to researchers and clinicians. In earlier studies, investigators examined whether subtypes of male batterers could be identified based on physiological markers in combination with observational and self-report perspectives. In a sample of batterers and their wives, they found a physiological marker that discriminated between two groups of violent men on several interesting dimensions. To highlight the importance of studying batterer typologies, the present study examined differences in marital interaction patterns across the two groups of batterers. Analyses revealed clinically relevant patterns of interaction in the two groups, and effect sizes indicating the possibility of differences between the two types of batterers. Implications for future research as well as therapy are discussed.     

Child Support: The Limits of Social Policy Based on Assumptions of Knavery Extending the Pillars of Social Policy Financing to Aged Care

Julian Le Grand has argued that a key component of welfare reform involves changes in the assumptions about human behaviour which are embedded in social policies. Policy assumptions have been transformed from espousing a belief that social service providers act as well-intentioned knights and recipients as passive pawns, to a stance in which all participants are regarded as self-seeking knaves. These ideas are particularly pertinent to policy developments concerning financial obligations for children, and this paper examines these issues in relation to child support policy in New Zealand. It highlights the evident and inevitable failure of this policy to meet its primary stated aim of revenue generation. In New Zealand this failure is compounded by the creation of parallel systems for dealing with children and families, one for financial obligations and the other for care and development, which are founded on diametrically opposed assumptions about human behaviour and capabilities. This confusion is symptomatic of a wider failure in government policy towards families in New Zealand.