Social Capital and Fire Service Performance: Evidence from the U.S. States*

Objective. The present study evaluates whether areas with high levels of social capital are likely to have better fire service performance. Method. Utilizing Robert Putnam's 14‐measure index of social capital, OLS regression techniques are applied to objective data on the rate of unintentional fire deaths in the U.S. states between 1980 and 2003. Results. The findings show that social capital is associated with a low unintentional fire death rate, even when controlling for a range of important environmental constraints. However, the effects of social capital vary by its conceptual components. Conclusions. The study supports the argument that social capital is likely to be an important determinant of fire service outcomes, and suggests that the political engagement and social trust components may be the most important focus for public policies seeking to build social capital in order to reduce fire fatalities.     

Assessing and communicating heterogeneity of treatment effects for patient subpopulations: Keynote and panel discussion on communicating heterogeneous treatment effects across populations

How do we communicate nuanced regulatory information to different audiences, recognizing that the consumer audience is very different from the physician audience? In particular, how do we communicate the heterogeneity of treatment effects - the potential differences in treatment effects based on sex, race, and age? That is a fundamental question at the heart of this panel discussion. Each panelist addressed a specific “challenge question” during their 5-minute presentation, and the list of questions is provided. The presentations were followed by a question and answer session with members of the audience and the panelists.     

Is Communication a Mechanism of Relationship Education Effects Among Rural African Americans?

Enhancing communication as a means of promoting relationship quality has been increasingly questioned, particularly for couples at elevated sociodemographic risk. In response, the current study investigated communication change as a mechanism accounting for changes in relationship satisfaction and confidence among 344 rural, predominantly low‐income African American couples with an early adolescent child who participated in a randomized controlled trial of the Protecting Strong African American Families (ProSAAF) program. Approximately 9 months after baseline assessment, intent‐to‐treat analyses indicated that ProSAAF couples demonstrated improved communication, satisfaction, and confidence when compared with couples in the control condition. Improvements in communication mediated ProSAAF effects on relationship satisfaction and confidence; conversely, neither satisfaction nor confidence mediated intervention effects on changes in communication. These results underscore the short‐term efficacy of a communication‐focused, culturally sensitive prevention program and suggest that communication is a possible mechanism of change in relationship quality among low‐income African American couples.     

Building better measures of role ambiguity and role conflict: The validation of new role stressor scales

Occupational stress researchers have given considerable attention to role ambiguity and role conflict as predictors of employee health, job attitudes and behaviour. However, the validity of the Rizzo, House, and Lirtzman’s (1970 Rizzo, J. R., House, R. J., &; Lirtzman, S. I. (1970). Role conflict and ambiguity in complex organizations. Administrative Science Quarterly, 15, 150–163. doi: 10.2307/2391486[Crossref], [Web of Science ®] , [Google Scholar]) scales – the most popular role stressor measures – has been a source of disagreement among researchers. In response to the disputed validity of the Rizzo et al. scales, we developed new measures of role ambiguity and role conflict and conducted five studies to examine their psychometric qualities (Study 1 N?=?101 U.S. workers; Study 2 N?=?118 workers primarily employed in the U.S.; Study 3 N?=?135 employed U.S. MBA students; Study 4 N?=?973 members of the U.S. Air Force (USAF); Study 5 N?=?234 workers primarily employed in the U.S.). Across these five studies, we found that the new role stressor scales have desirable psychometric qualities: they displayed high levels of substantive validity, high levels of internal consistency and test–retest reliability, they produced an interpretable factor structure, and we found evidence of their construct validity. We therefore recommend that these new scales be used in future research on role stress.     

CELLULAR PRODUCTION SYSTEMS: A CONCURRENT CLUSTER ANALYTIC FRAMEWORK

We propose an agglomerative heuristic cluster analysis framework for application to the part-family and machine-cell formation problems associated with group technology. This framework addresses the notion of concurrently forming clusters of parts (families) and machines (cells) based on natural between-part and between-machine relationships and the strength of association relating pairs of parts with pairs of machines. An illustrative model is presented and operational aspects demonstrated using a small problem.     

Buffering Effects of a Family-Based Intervention for African American Emerging Adults

This study focused on the buffering effects of Adults in the Making (AIM), a family-centered preventive intervention, on the link between life stress and increases in risk behaviors among 347 rural, southern African Americans as they left high school. Of the families, 174 were assigned to the prevention condition and 173 to a control condition. Emerging adults reported risk behaviors at pretest, posttest (7 months after pretest), and long-term follow-up (10 months after posttest). A significant Life stress × Prevention condition interaction emerged: Increases in risk behaviors were significantly greater among emerging adults in the control condition who experienced high stress levels than among those in the prevention condition who experienced equally high stress levels.     

Methods for combining ancillary data in stochastic compartment models of cancer mortality: Generalization of heterogeneity models∗

In analyzing mortality data there may be available information from survey and other sources that describe the marginal distribution of risk factors. We present a mortality model where nationally representative survey data on risk factor distributions are combined with data on cohort mortality rates to increase information, i.e., a fixed marginal risk factor distribution is combined with a cohort model representing unobserved individual risk heterogeneity. The model is applied to lung cancer mortality in nine U.S. white male cohorts aged 30 to 70 in 1950 and followed 38 years. Estimates of the cohort specific proportions of smokers were made from the National Health Interview Survey. Comparisons are made for models with different patterns of changes with age of individual heterogeneity.     

Psychosocial Adjustment of African American Children in Single‐Mother Families: A Test of Three Risk Models

Three models of risk were examined for 277 African American children from single‐mother‐headed homes: cumulative, additive, and indirect models. Risk factors were mother‐reported community risks, inadequate income, maternal depressive symptoms, and inadequate parenting. Child‐reported internalizing and externalizing difficulties served as dependent measures of adjustment. Whereas the cumulative risk model identified a subset of children within this group as at‐risk for adjustment difficulties, only more proximal family variables (maternal depressive symptoms and inadequate parenting) accounted for unique variance in child outcomes (additive risk model). However, the more distal risk factors—community risk and inadequate income—were linked to both internalizing and externalizing difficulties through the proximal family variables (indirect effects model).