EFFECTS OF EXPOSURE ON PREVALENCE AND CUMULATIVE RELATIVE RISK: DIRECT AND INDIRECT EFFECTS IN A RECURSIVE HAZARD MODEL

This paper outlines decomposition methods for assessing how exposure affects prevalence and cumulative relative risk. Let     x     denote a vector of exogenous covariates and suppose that a single dimension of time   t   governs two event processes     T ₁  and   T ₂.    If the occurrence of the event     T ₁    determines entry into the risk of the event     T ₂,    then subgroup variation in     T ₁    will affect the prevalence     T ₂,    even if subgroups in the population are otherwise identical. Although researchers often acknowledge this phenomenon, the literature has not provided procedures to assess the magnitude of an exposure effect of     T ₁    on the prevalence of     T ₂.    We derive decompositions that assess how variation in exposure generated by direct and indirect effects of the covariates     x     affect measures of absolute and relative prevalence of     T ₂.    We employ a parametric but highly flexible specification for baseline hazard for the     T ₁  and   T ₂    processes and use the resulting parametric proportional hazard model to illustrate the direct and indirect effects of family structure when     T ₁    is age at first sexual intercourse and     T ₂    is age at a premarital first birth for data on a cohort of non-hispanic white U.S. women.     

Universal versus contextual effects on TQM: a triangulation study using neural networks

The objective of this study is to extend previous research on total quality management (TQM)-context-performance relationships and ‘fit’ using multiple methods. We combine artificial neural networks (ANNs) with structural equation modelling (SEM) to analyse several hypotheses and propositions. This is the first study in this area of research that utilises ANNs and a triangulation technique in the presence of several contextual factors. The SEM analyses suggest that company size and industry type may have contingency effects on some of the TQM practices and/or TQM-performance relationships. However, the ANN models have shown that these two contingency factors do not moderate TQM outcomes, implying that all organisations can benefit from TQM regardless of size and type. As well, these models show that formal TQM implementation and/or ISO certifications do not add any predictive power to the ANN models except in one case: TQM implementation and/or ISO certification added to organisational effectiveness and customer results to predict financial and market (F&M) results. The results further indicate that even though implementing TQM alone has a bigger impact on F&M results than obtaining ISO certification alone, combining the two will have an even greater impact on these results. Joint implementation leads to greater improvements in organisational effectiveness, which, in turn, has a positive effect on customer results and consequently F&M results. This is a unique finding within the context of moderator effects on TQM-performance relationships.     

Accent on Teaching Materials

This department includes the two sections New Developments in Statistical Computing and Statistical Computing Software Reviews; suitable contents for each of these sections are described under the respective section heading. Articles submitted for the department, outside the two sections, should not be highly technical and should be relevant to the teaching or practice of statistical computing.

An unbiased estimator of e is used to motivate a simple simulation exercise that requires only observations from the distribution uniform on (0, 1). Antithetic variables are introduced and applied to the simulation problem to give a second unbiased estimator of e with reduced variance.     

Simulated and live practice teaching: The practice teacher's craft

The paper considers the assertion that students can learn how to practise exclusively through simulations, without working with real clients. The authors look at the benefits and difficulties of both live and simulated practice for the student's learning, and discuss two fallacies which, if left unchallenged, could threaten the existing arrangements for practice learning in social work. Finally, the paper describes practice teaching in terms of a craft.

This paper was first presented to a Conference of practice teachers and it preserves some of its original informality.     

Personalisation,individualism and the politics of disablement

This paper assesses the social policy narrative personalisation, and particularly the implications of the narrative for disability politics. The advantages and disadvantages of positioning specific funding mechanisms within the narrative are explored. It is argued that personalisation is insufficiently aligned with collective aspects of empowerment. More particularly, it disproportionately emphasises improvements in individual autonomy through personalised support, and lacks reference to structural oppression or the need for collective forms of action that bring about structural change. It is further argued that personalisation lack a multi-faceted analysis of disability and disempowerment, and as a result also lacks any vision of a positive alternative society. In assessing personalisation, the positive and negative dimensions of disabled people’s freedom are considered. As a response to the apparent shortcomings of personalisation, the integrated living approach and Centres for Independent Living are considered important elements in an alternative narrative to personalisation.     

Forcible,Drug-Facilitated,and Incapacitated Rape and Sexual Assault Among Undergraduate Women

Abstract

Objective: To examine the prevalence of drug-related sexual assaults, identify the frequency of assaults that occur following voluntary versus involuntary drug or alcohol consumption, and identify contextual correlates of drug-related assaults. Participants: College-student females (n = 314). Methods: Volunteers reported experiences with forcible and drug-related sexual assaults in the spring semester of 2004. Follow-up queries regarding the most severe drug-related assaults determined whether the assaults followed voluntary or involuntary alcohol or drug consumption. Results: 29.6% (n = 93) of the respondents reported a drug-related sexual assault or rape; 5.4% (n = 17) reported a forcible sexual assault or rape. Voluntary incapacitation preceded 84.6% of drug-related assaults and involuntary incapacitation preceded 15.4% of drug-related assaults. The majority of drug-related assaults (96.1%) involved alcohol consumption prior to assault. Conclusions: Drug-related sexual assaults on college campuses are more frequent than are forcible assaults and are most frequently preceded by voluntary alcohol consumption.     

Stories of (Social) Distress: Applied Narrative Analysis and Public Policy for the Homeless

Recent attention to the use of social science research in the formation of social policy highlights the role of narratives in the mediation of the relationships between research and practice, science and policy. This paper demonstrates the value of applied narrative analysis in revealing the function of narratives in this mediation. Public debate over a universal “right to shelter” for homeless persons in Washington D. C. is the central case study. The results illustrate the usefulness of applied narrative analysis in the study of social distress and in the forging of new links between research and policy.     

Practice teaching and knowledge

This paper asserts that levels of knowledge about practice teaching are low. It briefly reviews three areas; ideologies and paradigms of practice teaching, development of new structural arrangements and the processes of teaching and learning as experienced by students and practice teachers. An agenda for future inquiry is suggested.