Generalized stochastic dominance and bad outcome aversion

Incomplete preferences over lotteries on a finite set of alternatives satisfying, besides independence and continuity, a property called bad outcome aversion are considered. These preferences are characterized in terms of their specific multi-expected utility representations (cf. Dubra et al., J Econ Theory, 115:118–133, 2004), and can be seen as generalized stochastic dominance preferences.     

The “wrong skewness” problem in stochastic frontier models: A new approach

Stochastic frontier models are widely used to measure, e.g., technical efficiencies of firms. The classical stochastic frontier model often suffers from the empirical artefact that the residuals of the production function may have a positive skewness, whereas a negative one is expected under the model, which leads to estimated full efficiencies of all firms. We propose a new approach to the problem by generalizing the distribution used for the inefficiency variable. This generalized stochastic frontier model allows the sample data to have the wrong skewness while estimating well-defined and nondegenerate efficiency measures. We discuss the statistical properties of the model, and we discuss a test for the symmetry of the error term (no inefficiency). We provide a simulation study to show that our model delivers estimators of efficiency with smaller bias than those of the classical model even if the population skewness has the correct sign. Finally, we apply the model to data of the U.S. textile industry for 1958–2005 and show that for a number of years our model suggests technical efficiencies well below the frontier while the classical one estimates no inefficiency in those years.     

Robust optimization in distribution-based demand planning: a model for negotiation support

In this paper a model for negotiation support in tactical procurement planning is designed, which is based on a real planning problem from the liquid gas trade sector. The problem is modeled as an assignment problem and transformed into a robust form. Computational experiments using data from a practice partner are presented to demonstrate the effective decision support of our approach.     

The mediating role of frustration of psychological needs in the relationship between job insecurity and work-related well-being

Abstract

This study aims to test a new process underlying the negative relationship between job insecurity and work-related well-being. Specifically, based on Self-Determination Theory, frustration of the psychological needs for autonomy, belongingness and competence was expected to explain the associations between job insecurity and emotional exhaustion and vigour (i.e. the core energy-related components of burnout and work engagement, respectively). Structural equation modelling using data from a heterogeneous sample of 3185 Flemish employees confirmed that frustration of the three needs mediated the association between job insecurity and both outcomes. These results suggest that job insecurity is related to impaired work-related well-being, because it frustrates employees’ psychological needs. This study contributes to a rather small, but growing body of research on the theoretical explanations of the negative consequences of job insecurity for employees’ work-related well-being.     

Well-being in times of task restructuring: The buffering potential of workplace learning

In this paper, we focus on task restructuring as one of the most frequently occurring types of change in our contemporary knowledge society. In spite of its evident prevalence, research on task restructuring and employee well-being has been scarce until now. Based on Conservation of Resources (COR) theory and the Job Demands-Resources (JD-R) model, we argue that task restructuring is negatively related with employee well-being (in terms of emotional exhaustion and vigour). Furthermore, we advance that opportunities for learning through reflection and experimentation, as well as recently acquired KSAOs can serve as buffers in the relationship between task restructuring and well-being. Hierarchical regression analyses and simple slope analyses were conducted in order to test the research hypotheses on a large sample of the Dutch working population (N = 1711). Task restructuring had a positive association with emotional exhaustion and a negative one with vigour. Furthermore, recently acquired KSAOs, as well as opportunities for reflection and experimentation, buffered the relationship between task restructuring and emotional exhaustion. Opportunities for reflection and experimentation moderated the relationship between task restructuring and vigour as well. This study suggests that workplace learning can mitigate the negative relationship between task restructuring and well-being.     

The relationship between organisational change and being a perpetrator of workplace bullying: A three-wave longitudinal study

ABSTRACT

While research has unravelled the association between organisational change and being a target of workplace bullying, scholars have still to shed light on the perpetrator perspective of this association. In the current study, we further the literature by investigating the relationship between exposure to organisational change and being a perpetrator of workplace bullying. We introduced perceptions of psychological contract breach as a mechanism that accounts for the process in which exposure to organisational change leads employees to direct bullying behaviours to other members of the organisation. Using three-wave longitudinal data from 1994 employees we estimated a between-subjects mediation model controlling for autoregressive effects. Results confirmed our hypothesis that exposure to organisational change at Time 1 was positively related to being a perpetrator of workplace bullying at Time 3 through perceptions of psychological contract breach at Time 2. These findings suggest that organisations should invest in factors that lower employees’ likelihood to perceive psychological contract breach in the aftermath of organisational change because these perceptions may indeed result in the enactment of workplace bullying towards other members of the organisation.     

Rota-Risk-Profile-Analysis

Abstract

In this article an update of the Rota-Risk-Profile-Analysis (RRPA) is presented. This RRPA is based on 9 rota-risk criteria that are central to a more encompassing rota theory. The RRPA allows coherent assessment of the physical and social risks of a working-time schedule (rota). comparison of schedules with one another in quantitative terms and interpretations of possible differential effects more adequately. First, a closer look at the instrument-a computer program-is taken. Afterwards the criteria and their way of implementation are discussed briefly. To get an impression of the way that RRPA functions an example will be given by applying the instrument to the working rotas from a study on shiftwork in the Netherlands.     

Brand management: Unveiling the delusion of control

Mainstream brand management literature views brands as products or organisations carrying brand names and brand managers as being in control of brand-related actions and outcomes. By contrast, recent empirical research shows the substantial influence of stakeholders on brands. Together with brand management, stakeholders shape brands by participating in brand-related interaction. European brand research accordingly treats brands as ongoing and complex processes in constant flux. Nevertheless, literature suffers from a significant lack of theoretical underpinnings for understanding brands as complex processes; in this respect, building on European philosophy is a fruitful avenue. This paper introduces the metaphor of the rhizome and draws on European process philosophy to further develop an integrative processual understanding of brands. Brand management claiming control over brands as processes turns out to be a delusion.     

Further theoretical results and a comparison between two methods for approximating eigenvalues of perturbed covariance matrices

Covariance matrices, or in general matrices of sums of squares and cross-products, are used as input in many multivariate analyses techniques. The eigenvalues of these matrices play an important role in the statistical analysis of data including estimation and hypotheses testing. It has been recognized that one or few observations can exert an undue influence on the eigenvalues of a covariance matrix. The relationship between the eigenvalues of the covariance matrix computed from all data and the eigenvalues of the perturbed covariance matrix (a covariance matrix computed after a small subset of the observations has been deleted) cannot in general be written in closed-form. Two methods for approximating the eigenvalues of a perturbed covariance matrix have been suggested by Hadi (1988) and Wang and Nyquist (1991) for the case of a perturbation by a single observation. In this paper we improve on these two methods and give some additional theoretical results that may give further insight into the problem. We also compare the two improved approximations in terms of their accuracies.