Bayesian regularisation in structured additive regression: a unifying perspective on shrinkage, smoothing and predictor selection

This paper surveys various shrinkage, smoothing and selection priors from a unifying perspective and shows how to combine them for Bayesian regularisation in the general class of structured additive regression models. As a common feature, all regularisation priors are conditionally Gaussian, given further parameters regularising model complexity. Hyperpriors for these parameters encourage shrinkage, smoothness or selection. It is shown that these regularisation (log-) priors can be interpreted as Bayesian analogues of several well-known frequentist penalty terms. Inference can be carried out with unified and computationally efficient MCMC schemes, estimating regularised regression coefficients and basis function coefficients simultaneously with complexity parameters and measuring uncertainty via corresponding marginal posteriors. For variable and function selection we discuss several variants of spike and slab priors which can also be cast into the framework of conditionally Gaussian priors. The performance of the Bayesian regularisation approaches is demonstrated in a hazard regression model and a high-dimensional geoadditive regression model.     

Order extensions,budget correspondences,and rational choice

This article is concerned with extensions of a continuous ordering R on a set X to a subset P(X) of the power set of X. The underlying topology will be the Hausdorff metric topology. We will see that continuous extensions of R do not require that P(X) contain every nonempty finite subset of X. Therefore, the analysis can be applied to consumer theory and inverse choice functions. In analogy to these functions budget correspondences are established which relate alternatives x with certain subsets of X, according to the extended ordering.     

Information technology (IT) accessibility: implications for employment of people with disabilities

Online technology has made significant inroads into human resource (HR) processes such as recruitment, benefits, and training, yet many web sites are inaccessible to people with disabilities. Cornell University surveyed 433 HR representatives regarding their organizations' use of information and Web technology in HR processes. Survey results report that nine of the ten organizations use Web processes for job postings, eight of ten for online benefits information dissemination, and about six out of ten for online benefits self service and online employee training. Employee use of computers was extensive, with the majority using computers more than half the workday. Knowledge of assistive technologies for computer users with disabilities and of Web accessibility considerations was low, but nearly half the respondents reported having made some type of adaptation to make a computer accessible to an employee with a disability. Very few organizations had trained any of their staff in Web accessibility topics or in making computers accessible, and the majority desired more information on those topics. These findings have implications not only for people with disabilities, but for the general workforce, which is aging.     

Elderly People's Perceptions of a Telehealthcare System: Relative Advantage,Compatibility, Complexity and Observability

The use of telehealthcare systems to promote independent living for elderly people is growing. The results presented in this article, derived from an initial user lab test of a telecare system—GiraffPlus—indicate that the crucial factor for adoption of telehealthcare systems is not usability but the system's ability to support autonomy in everyday life. Eleven users tested the usability and reported what they perceived as possible benefits of having such a system at home. To support autonomy, customization is crucial for the system to be perceived as meaningful for the individual. Our analysis confirms previous research.     

’Tis Beauty Kills the Beast: Aesthetic and Sensory Transformations of Encapsulated States

The author examines a particular form of addictive exploitation of sensory experience to extend Meltzer’s concept of claustrum states. She elaborates how bodily experience—both the patient’s and the analyst’s—is key to emergence from these states. Following the distinction between holding and containing made by Bion and Cartwright, the author traces the reciprocity of meaning making through the analyst’s seeing/sensing of beauty in the patient, noted by the analyst’s erotic response to a coming-alive self, allowing for aesthetic reciprocity and transformation.     

Explained Variation and Predictive Accuracy in General Parametric Statistical Models: The Role of Model Misspecification

When studying a regression model measures of explained variation are used to assess the degree to which the covariates determine the outcome of interest. Measures of predictive accuracy are used to assess the accuracy of the predictions based on the covariates and the regression model. We give a detailed and general introduction to the two measures and the estimation procedures. The framework we set up allows for a study of the effect of misspecification on the quantities estimated. We also introduce a generalization to survival analysis.     

Leading well is a matter of resources: Leader vigour and peer support augments the relationship between transformational leadership and burnout

ABSTRACT

Although studies suggest that transformational leaders play an important role in employee health and well-being, the relationship between transformational leadership and employee burnout remains unclear. One reason may be that moderators may play an important role. Building on conservation of resources theory, we examined if leaders’ perceptions of internal and external resources in terms of vigour and peer support augmented the relationship between transformational leadership and employee burnout in a sample of municipality workers and their leaders in Sweden (N?=?217). Multilevel analyses over two time points revealed that both vigour and peer support enhance this relationship, such that when leaders experience high levels of vigour or peer support, the negative relationship between transformational leadership behaviours and employee burnout was strengthened. Our findings suggest that both personal and contextual resources may help leaders to better engage in transformational leadership, which is important in order to protect employees from burning out.