A Weibull Regression Model with Gamma Frailties for Multivariate Survival Data

Frequently in the analysis of survival data, survival times within the same group are correlated due to unobserved co-variates. One way these co-variates can be included in the model is as frailties. These frailty random block effects generate dependency between the survival times of the individuals which are conditionally independent given the frailty. Using a conditional proportional hazards model, in conjunction with the frailty, a whole new family of models is introduced. By considering a gamma frailty model, often the issue is to find an appropriate model for the baseline hazard function. In this paper a flexible baseline hazard model based on a correlated prior process is proposed and is compared with a standard Weibull model. Several model diagnostics methods are developed and model comparison is made using recently developed Bayesian model selection criteria. The above methodologies are applied to the McGilchrist and Aisbett (1991) kidney infection data and the analysis is performed using Markov Chain Monte Carlo methods. This revised version was published online in July 2006 with corrections to the Cover Date.     

Faith‐Based Social Service Organizations and Government Funding: Data from a National Survey*

Objective. The objective of the research reported in this article is to test four hypotheses concerning government funding among faith‐based social service coalitions: that it is positively related to size and organizational professionalism; positively related to attitudes toward government funding; positively related to social activism; and negatively related to organizational religiosity. Method. Our method is the application of OLS and probit analysis to data from a national survey of 656 such organizations. Results. Using three measures of government funding and 12 predictor variables, results are mixed in their support of the size and professionalization hypothesis and generally support the remaining hypotheses. These findings are replicated when we compare coalitions that had and had not applied for government funding. Conclusions. Our findings emphasize that greater religious expressiveness dissuades coalitions from both seeking and receiving government funding, but higher levels of social activism expedite both.     

The Single Assessment Process in Primary Care: Older People's Accounts of the Process

Recent government policies have been active in addressing socialinclusion and active participation of older people in many aspectsof societal life. Independence and well-being animate thesedevelopments and are evident in the emphasis on person-centredservices within the single assessment process for older people(Department of Health, 2002b). Drawing on a feasibility study of the Single Assessment Processas a ‘case-finding’ approach, this paper presentsfindings drawn from older people’s accounts of this experience.These accounts indicate the potential of the process for identifying‘low-level’ need, whilst raising issues of accessto formal services and resource constraint; also they underlinethe importance of understanding how older people seek ways ofmanaging their own health and well-being, whilst continuingto contribute to the social cohesion of society by providingsupport to their peers and to younger generations. Interdependence, it is suggested, rather than dependence shouldunderlie any approach to assessing older people’s needs,if we are to appreciate and build upon the complexity of olderpeople’s strategies for actively managing their lives.     

The impact of unemployment on marriage and divorce

"The present study was designed to explore whether unemployment has a deleterious impact on family life, resulting in lower rates of marriage and births and higher rates of divorce. Time series data were available for twelve nations for the 35 year period of 1950 to 1985, and the present paper reports analyses of these data sets." The results indicate that unemployment is associated with lower marriage and birth rates and higher divorce rates.