Statisticians Can Matter

Statisticians fall far short of their potential as guides to enlightened decision making in business. Two important explanations are: (1) Decision makers are often more easily convinced by concrete examples, however fragmentary and misleading, than by competent statistical analysis. (2) The effective use of statistics in the process of decision making requires hard thinking by decision makers, thinking that cannot be delegated entirely to the statistical specialist. Modern developments in interactive statistical computing may help to reduce the force of these limitations on exploitation of statistics; used properly, computing can encourage, almost force, the student or business user of statistics to think statistically.     

Bayesian Nonparametric Hidden Markov Models with application to the analysis of copy-number-variation in mammalian genomes

We consider the development of Bayesian Nonparametric methods for product partition models such as Hidden Markov Models and change point models. Our approach uses a Mixture of Dirichlet Process (MDP) model for the unknown sampling distribution (likelihood) for the observations arising in each state and a computationally efficient data augmentation scheme to aid inference. The method uses novel MCMC methodology which combines recent retrospective sampling methods with the use of slice sampler variables. The methodology is computationally efficient, both in terms of MCMC mixing properties, and robustness to the length of the time series being investigated. Moreover, the method is easy to implement requiring little or no user-interaction. We apply our methodology to the analysis of genomic copy number variation.     

‘We've Got One of Those’: The Peripheral Status of Women in Male Dominated Industries

This article uses evidence from 269 interviews in five companies to consider whether (i) equal opportunity laws, policies and practices, (ii) more women gaining post-entry professional qualifications, establishing themselves on the lower rungs of hitherto male careers, and working full-time, combined with (iii) projected skill shortages, are likely to break down gender segmentation and lead to greater equality in employment during the 1990s. The evidence suggests that even females who start strongly and appear potential high-fliers are still being obstructed by harsh, in some respects, and in other ways patronizing, workplace cultures, coupled with demands for career commitment that are incompatible with the domestic responsibilities which it is assumed women will adopt, and which the majority are in fact still adopting at least at certain stages during their working lives. The effects in the companies studied were to deflect women out of mainstream careers into peripheral occupations, or into peripheral jobs within skilled mainstream occupations. In these companies neither the men nor the exceptional women who were succeeding appeared a likely source of pressure for change, and male domination remained fully compatible with the firms' preferred skill formation strategies.     

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.     

Worker perceptions of procedural justice in workers’ compensation claims: Do unions make a difference?

The differences between union and nonunion workers’ perceptions of the fairness of the workers’ compensation claims process are examined. The hypothesis tested is that union members should perceive this process as more fair due to union “voice.” The data were collected in a survey of injured workers in Michigan who had filed a workers’ compensation claim. The empirical results indicate that unions have little impact on the perceived fairness of the claims process and that the main contribution of unions is the provision of a complaint mechanism. From the Bill of Rights to Chief Justice Earl Warren’s recurring inquiry of counsel, “but is it fair?” fair treatment has been treated as a value enforceable by law, standing at the very core of the constitutional, political, and social rights of the individual. —Westin and Feliu (1988, p. 255)     

The evaluation ranking scale: clarification of methodological and procedural issues

Compared with CSQ-8, a typical questionnaire approach to assessing global patient satisfaction, the Evaluation Ranking Scale (ERS) had equally good patient acceptability, yielded more normally distributed satisfaction scores, and results allowed comparative information about patients' evaluation of specific service dimensions. The study also addressed key questions that have emerged about the ERS procedure. Patients apparently do not distinguish conceptually between "importance" of dimensions and "satisfaction" with dimensions in the first phase (ranking) of the ERS. Results did confirm that the ERS sequence of ranking and then rating the dimensions is essential to achieving optimal utility of results. The ranking task seems to have an organizing effect on patients' approach to the rating task. This effect does not work to dictate results in the rating phase but rather seems to familiarize patients with the dimensions to be rated thereby yielding greater potential discriminative capacity for the ERS. Finally, results indicate that the ERS can be administered in a flexible fashion that yields additional information about the absolute importance of the six dimensions without loss of desired operating characteristics for the measure.     

Peak performing organisations

The literature on organisational performance is riddled with measurement problems that cannot easily be solved. In contrast we argue that elite theory in terms of performance can be more easily measured by the win record of sports organisations. Accordingly, this article argues that certain organisational peak practices are key to understanding how peak performance is sustained. Through data collected from the top ten sports organisations in the world we introduce the embryonic theory of Peak Performing Organisations (PPO). Sustained PPO practices offer more robust outcomes than the genre of High Performing Organisations.     

Causal Evidence for Exclusively Positive Parenting and for Timeout: Rejoinder to Holden,Grogan-Kaylor,Durrant, and Gershoff (2017)

Abstract

In our initial article we raised concerns about a paradigm we called “Exclusively Positive Parenting” (EPP). This paradigm opposes all negative disciplinary consequences, including timeout and privilege removal. We argued that the empirical support for EPP was insufficient. Researchers should not rely on insufficient causal evidence to replace well-established parenting perspectives that combine positive parenting with appropriate firm control. In reply, Holden et al. defended EPP. In this rejoinder to them we do two things. First, we use their citations to evaluate the limited causal evidence (four randomized studies) for what EPP supports. Second, we summarize the evidence for timeout, which EPP opposes. To do that, we offer the first known meta-analysis of the overall effectiveness of timeout, based on 24 studies with strong causal evidence for its effectiveness with young oppositional defiant children (6 randomized clinical studies; 18 small-N experimental designs). We call for parenting researchers to synthesize positive parenting techniques and disciplinary consequences based on adequate causal evidence.     

Exploring variation in active network size: Constraints and ego characteristics

Studies of active personal networks have primarily focused on providing reliable estimates of the size of the network. In this study, we examine how compositional properties of the network and ego characteristics are related to variation in network size. There was a negative relationship between mean emotional closeness and network size, for both related and unrelated networks. Further, there was a distinct upper bound on total network size. These results suggest that there are constraints both on the absolute number of individuals that ego can maintain in the network, and also on the emotional intensity of the relationships that ego can maintain with those individuals.