Bayesian spectral analysis models for quantile regression with Dirichlet process mixtures

This paper presents a Bayesian analysis of partially linear additive models for quantile regression. We develop a semiparametric Bayesian approach to quantile regression models using a spectral representation of the nonparametric regression functions and the Dirichlet process (DP) mixture for error distribution. We also consider Bayesian variable selection procedures for both parametric and nonparametric components in a partially linear additive model structure based on the Bayesian shrinkage priors via a stochastic search algorithm. Based on the proposed Bayesian semiparametric additive quantile regression model referred to as BSAQ, the Bayesian inference is considered for estimation and model selection. For the posterior computation, we design a simple and efficient Gibbs sampler based on a location-scale mixture of exponential and normal distributions for an asymmetric Laplace distribution, which facilitates the commonly used collapsed Gibbs sampling algorithms for the DP mixture models. Additionally, we discuss the asymptotic property of the sempiparametric quantile regression model in terms of consistency of posterior distribution. Simulation studies and real data application examples illustrate the proposed method and compare it with Bayesian quantile regression methods in the literature.     

Physician perspectives on the structure and function of group practice HMOs

This article explores physicians' perspectives regarding how their HMOs function and their satisfaction with and loyalty to HMOs. Three HMOs were studied: a mature (28-year-old) staff model, a 16-year-old staff model, and a 13-year-old group model with both HMO and fee-for-service patients. While these HMOs were found to vary somewhat in terms of emphasis on patient care versus costs, methods used to control costs and degrees of centralization of decision making, they all received high overall satisfaction and loyalty scores. The staff model HMO with a more decentralized decision making structure received the highest satisfaction/loyalty score from its physicians. The degree to which physicians perceive the HMO to be effective and supportive and the use of educational programs and peer review to influence resource use were also found to be significantly related to physician satisfaction and loyalty.     

Human Capital Disparities and Earnings Inequality in The Portuguese Private Labour Market

Social Indicators Research - This paper examines human capital inequality and how it relates to earnings inequality in Portugal using data from Quadros de Pessoal for the period 1986–2017....     

Collective Memory and Social Restructuring in the Case of Traditional Inuit Shamanism

This article explores the sociological processes of collective memory manipulation in unsettled times by analyzing a case study of the Church's displacement of traditional shamanism in Arviat, Nunavut. Collective memory studies, which examine regime transitions, focus on tracing the path of collective memory, rather than examining the mechanisms used to gain and keep control over collective memory. I argue that three elements are necessary for this kind of control: (1) shifting the “historical horizon” to temporally locate the competing institution firmly in the past within community memory, (2) manipulating the reputation of the competing, soon‐to‐be‐previous institution, and (3) establishing a new moral framework. I center my argument primarily on the accomplishment of these elements using narrative and rhetoric, which emerged through inductive analysis.     

Beyond the Time Crunch: New Directions in the Sociology of Time and Work

The sociology of work is particularly poised to study the meaning of time within institutions and organizations at its most sociological manifestation – the point where groups of people come together to accomplish joint goals. Previous work has offered useful concepts to help us understand temporality and tempography, home and work balance, temporal practices and mindsets towards time. Most of this work, however, which directly or peripherally treats time in the workplace, has focussed on the work–life balance. The actual temporal experiences of workers, however, are relatively absent in this literature. In this review article, I outline previous contributions from sociologists of work and offer ways in which work from the broader literature on the sociology of time can enhance this field. I address how future research should focus on how “time work” is accomplished in workplaces and on issues of class and gender.     

How organizations want to be viewed: Public relations photographs in online wire services

The study explored the characteristics of photos in online news wire services. Nearly 70% of the photos represented product, CEO and events when examining photo content. The most distinguished purpose of the public relations photos were publicity and public announcements, followed by image building. Almost all of the publicity photographs were provided by business/industry organizations. Supporting arguments for the independence of public relations do not seem to be voiced by public relations practitioners in the analysis of photos.     

In Praise of Sneaky Poo: A Case,Four Whites,and a Missing Narrative

Sneaky Poo (1984) announced Michael White, the second order cyberneticist, to the world. But there were several versions of both Sneaky Poo and White. This paper pays homage to Sneaky and critiques White's contribution to family therapy. A recent case is reported.     

F-tests with a rare pathology

ANOVA is routinely used to compare pathologies. Nevertheless, in many situations, the sample dimensions may not be known when planning the study. This is specially relevant when one of the pathologies is rare. Thus, the sample size for that pathology or for all pathologies must be considered as random. Sample selection for the non-rare pathologies may be carried out to increase the balance of the model. This leads to F-tests with random non-centrality parameters and random degrees of freedom for the errors. The distribution of such tests statistics is obtained.     

Alcohol Use after Combat-Acquired Traumatic Brain Injury: What We Know and Don't Know

Military personnel engage in unhealthy alcohol use at rates higher than their same age, civilian peers, resulting in negative consequences for the individual and jeopardized force readiness for the armed services. Among those returning from combat deployment, unhealthy drinking may be exacerbated by acute stress reactions and injury, including traumatic brain injury (TBI). Combat-acquired TBI is common among personnel in the current conflicts. Although research suggests that impairments due to TBI leads to an increased risk for unhealthy drinking and consequences among civilians, there has been little research to examine whether TBI influences drinking behaviors among military personnel. This article examines TBI and drinking in both civilian and military populations and discusses implications for clinical care and policy.     

The Internet: An Essential Tool for College Health Networking

Abstract

With the advent of the Internet, college health professionals have available to them a new setting in which to network. The Internet provides opportunities for immediate communication with a large and diverse community of colleagues. Through both the Student Health Service (SHS) Discussion Group and numerous health-related databases, the Internet serves as a powerful research tool for program development and improvement. Answers to queries about practice options, solutions for local problems, and support of innovative policies can be received almost instantaneously from college health professionals from across the United States and Canada. In this article, the authors summarize the history and current use of the SHS Discussion Group, provide a brief overview of Internet basics, and identify more advanced uses of the Internet by college health professionals.