Bayesian palaeoclimate reconstruction

Summary.  We consider the problem of reconstructing prehistoric climates by using fossil data that have been extracted from lake sediment cores. Such reconstructions promise to provide one of the few ways to validate modern models of climate change. A hierarchical Bayesian modelling approach is presented and its use, inversely, is demonstrated in a relatively small but statistically challenging exercise: the reconstruction of prehistoric climate at Glendalough in Ireland from fossil pollen. This computationally intensive method extends current approaches by explicitly modelling uncertainty and reconstructing entire climate histories. The statistical issues that are raised relate to the use of compositional data (pollen) with covariates (climate) which are available at many modern sites but are missing for the fossil data. The compositional data arise as mixtures and the missing covariates have a temporal structure. Novel aspects of the analysis include a spatial process model for compositional data, local modelling of lattice data, the use, as a prior, of a random walk with long-tailed increments, a two-stage implementation of the Markov chain Monte Carlo approach and a fast approximate procedure for cross-validation in inverse problems. We present some details, contrasting its reconstructions with those which have been generated by a method in use in the palaeoclimatology literature. We suggest that the method provides a basis for resolving important challenging issues in palaeoclimate research. We draw attention to several challenging statistical issues that need to be overcome.     

Don't Screw the Crew: Exploring the Rules of Engagement in Organizational Romance

Thirty years ago sociological research began to discover what workplace romance might mean for the participants. Since then management research has tended to adopt a functionalist approach, using survey methods, or third‐party approaches to ask about company policy and negative consequences of workplace romance, warning of the dangers and consequences of romance and offering solutions for managers on how to deal with this potential problem. Drawing on the sexuality of organization and critical literature, and adopting a position of constructivist structuralism with a qualitative research method, this research looks at how the concept of workplace romance is defined and negotiated within a public‐house setting. It examines the ‘rules of engagement’, the personal experiences and views of both managers and workers, as well as first‐hand stories of workplace romance. Romance was conceptualized as ‘natural’ and something that could not be legislated for, where unwritten rules were defined but often ignored. However, the ‘rules of engagement’ emerged as favouring particular groups depending on gender, position in the hierarchy and sexual identity. Subjective value judgements are made, often resting on gendered assumptions of male and female behaviour.     

Participatory Organizational Research: Examining Voice in the Co‐production of Knowledge

This paper advances participatory methods in management research. We propose the term participatory organizational research to describe this adjunct to action research. We illustrate the potential of the method to allow sometimes unheard organizational members to generate alternative perspectives that can offer the potential for the co‐production of new forms of knowledge that are locally relevant. Participatory methods originate from work with marginalized groups and have been used more commonly in community and organizational development. The aim of such research is, generally, to change the social and organizational conditions within which participants operate by using their perspectives as active participants to develop alternative possibilities. As such, this research method has significant potential for management researchers in providing the means for unheard organizational members to voice their perspectives: a central component, we argue, in knowledge co‐production. Based on a participatory study of care quality in elder care institutions, we examine in detail how participatory organizational research can enable voice and explore some of the structural limitations particularly in respect of research ethics.     

When Strategic Approaches get Stuck: Maps out of the Mire

Using a biopsychosocial model, a three dimensional map provides guidelines for changing from strategic therapy when progress in this approach falters. The method is pragmatic and atheoretical, and brings together ideas from various schools which empirically have been found useful. Practical and inclusive guidelines are offered for family (and individual) therapy which address two important issues: reinforcement of change when progress is occurring, and a shift from an interactional to another dimension when stuck points are reached. The multi-dimensional approach is clear, can be used by individuals or teams, lends itself to teaching and is of particular value for entrenched and complex problems. Four case histories are presented to highlight the approach.     

Multilevel models for longitudinal data

Summary.  Repeated measures and repeated events data have a hierarchical structure which can be analysed by using multilevel models. A growth curve model is an example of a multilevel random-coefficients model, whereas a discrete time event history model for recurrent events can be fitted as a multilevel logistic regression model. The paper describes extensions to the basic growth curve model to handle auto-correlated residuals, multiple-indicator latent variables and correlated growth processes, and event history models for correlated event processes. The multilevel approach to the analysis of repeated measures data is contrasted with structural equation modelling. The methods are illustrated in analyses of children's growth, changes in social and political attitudes, and the interrelationship between partnership transitions and childbearing.     

The Tellado case study exercise: A metacritique

This paper provides an overview and critique of the papers in the Tellado Case Study Exercise. Two main themes are found in the critiques: the belief that Tellado lacked a clear audience for his evaluation and that he lacked an appropriate change orientation that would insure utilization. The sources of these criticisms are discussed from the perspective of evaluation as a linkage activity. The use of this perspective leads to the recognition that all parties to the case study may have focused on the wrong stakeholders in the utilization process. Thus, a major problem with utilization-focused and stakeholder based approaches to evaluation is revealed. Possible ways to avoid this problem are discussed. The paper concludes with a request for additional case studies to be contributed to the journal.