Obesity-related behaviors in adolescent friendship networks

This study examines obesity-related behaviors within adolescent friendship networks, because adolescent peers have been identified as being important determinants of many health behaviors. We applied ERGM selection models for single network observations to determine if close adolescent friends engage in similar behaviors and to explore associations between behavior and popularity. Same-sex friends were found to be similar on measures of organized physical activity in two out of three school-based friendship networks. Female friends were found to engage in similar screen-based behaviors, and male friends tended to be similar in their consumption of high-calorie foods. Popularity (receiving ties) was also associated with some behaviors, although these effects were gender specific and differed across networks.     

Harnessing the Theoretical Foundations of the Exponential and Beta‐Poisson Dose‐Response Models to Quantify Parameter Uncertainty Using Markov Chain Monte Carlo

Dose‐response models are the essential link between exposure assessment and computed risk values in quantitative microbial risk assessment, yet the uncertainty that is inherent to computed risks because the dose‐response model parameters are estimated using limited epidemiological data is rarely quantified. Second‐order risk characterization approaches incorporating uncertainty in dose‐response model parameters can provide more complete information to decisionmakers by separating variability and uncertainty to quantify the uncertainty in computed risks. Therefore, the objective of this work is to develop procedures to sample from posterior distributions describing uncertainty in the parameters of exponential and beta‐Poisson dose‐response models using Bayes's theorem and Markov Chain Monte Carlo (in OpenBUGS). The theoretical origins of the beta‐Poisson dose‐response model are used to identify a decomposed version of the model that enables Bayesian analysis without the need to evaluate Kummer confluent hypergeometric functions. Herein, it is also established that the beta distribution in the beta‐Poisson dose‐response model cannot address variation among individual pathogens, criteria to validate use of the conventional approximation to the beta‐Poisson model are proposed, and simple algorithms to evaluate actual beta‐Poisson probabilities of infection are investigated. The developed MCMC procedures are applied to analysis of a case study data set, and it is demonstrated that an important region of the posterior distribution of the beta‐Poisson dose‐response model parameters is attributable to the absence of low‐dose data. This region includes beta‐Poisson models for which the conventional approximation is especially invalid and in which many beta distributions have an extreme shape with questionable plausibility.     

Robin Williams, Race, and American Sociology

In this essay, I discuss Robin M. Williams Jr.'s unique sociological approach to the study of race and the ways his background and the historical moment in which he wrote contributed to his sociological vision.     

Intergenerational Relations: Themes, Prospects, and Possibilities

This commentary provides an examination of the articles within this issue with a focus on common themes throughout. Each article is briefly reviewed in the context of how it contributes to four overarching themes of current intergenerational research. The articles within this issue also have implications for developing policy that fosters intergenerational relationships. This commentary concludes with a discussion of the complex issues that arise in creating such policy and utilizes Allport's (1954) "contact hypothesis" as a framework to guide future policy work addressing the myriad of issues within the realm of intergenerational relationships.     

A 'Rave' Review: Conceptual Interests and Analytical Shifts in Research on Rave Culture

Raves have historically referred to grassroots organized, antiestablishment and unlicensed all-night dance parties, featuring electronically produced dance music, such as techno, house, trance and drum and bass. Since their late-1980s origins in the UK, raves have gained widespread popularity and transformed dramatically. Consequently, their many cultural traits and behaviors have garnered much sociological interest, which mostly falls into two competing perspectives: cultural studies and public health. In this paper, we review what raves look like today compared to their high point in the 1990s. We then discuss how the cultural studies and public health perspectives define raves and have studied them over time, focusing on the 'pet' sociological concepts each has sought to advance. Our analysis of these literatures reveals important differences in rave research by country and over time. We end by discussing the politics associated with the shift in rave research.     

Young unwed fathers of afdc children: do they provide support?

We examine the support provided by fathers of children born to disadvantaged teenage mothers. Our sample includes the fathers of 6,009 children born over a two-year period to 3,855 teenage mothers receiving AFDC in three economically depressed inner cities. These fathers provide little social and economic support to their children. Support declines as their children age from infants to toddlers and as fathers’ relationships with the mothers grow more distant. Fathers’ employment status and educational attainment positively affect the amount of economic support that they provide but do not strongly influence the amount of social support they provide.     

Characterization of distributions by conditional expectation of generalized order statistics

In this work, general forms of many well-known continuous probability distributions are characterized by conditional expectation of some functions of generalized order statistics. These results are the generalization of the characterization results based on conditional expectation of the functions of order statistics given by Khan and Abu-Salih (1989).