Effectiveness of student assistance programs in Nebraska schools.

BACKGROUND: This study investigated whether Nebraska schools with Student Assistance Programs (SAP) are associated with reduced adolescent alcohol use and a higher level of academic achievement than students from schools without a SAP. METHODS: In 1992, the Toward a Drug Free Nebraska (TDFN) survey was administered to 3,454 students in grades seven to twelve at eighty-three Nebraska schools. A second survey, the TDFN "team activity report" collected from each school's team, the presence of a SAP (n = 34 schools) or absence of a SAP (n = 49 schools). Student responses for alcohol use and academic achievements were linked with the presence of a SAP through use of a school identification number on both surveys. RESULTS: Students from schools with a SAP reported a lower use of alcohol in the last thirty days, compared with students from schools without a SAP program (p < 0.05), and they also reported a significant difference in academic achievement (p < 0.05). CONCLUSIONS: While this study used post hoc analysis of data, the results suggest lower alcohol use and higher academic achievement among students from SAP schools. Given SAPs' popularity, these trends suggest that further research should be conducted to demonstrate the effectiveness of student assistance programs.     

Relational demography in the workplace and health: an analysis of gender and the subordinate-superordinate role-set

Using data from a 2005 national survey of working adults in the United States, we examine the effects of the gender composition of the superordinate-subordinate role-set on mental and physical health measures. Subordinates' and superordinates' genders are important determinants. Men who work in gender-mixed superordinate contexts (i.e., with one male and one female superior) report lower levels of distress and physical symptoms than men who work with one male superior. Women who work with one male superior report less distress and fewer physical symptoms compared to women who work with one female superior or in gender-mixed superordinate contexts. With a few exceptions, these observations generally hold net of occupation, job sector, and an array of work-related conditions. We discuss the implications of these findings in light of predictions derived from the similarity-attraction and role congruity theories. We also outline ways that theoretical development in relational demography can be refined by a more specific focus on the demographic characteristics--especially gender--of the superordinate-subordinate role-set.     

Administrative fellowships in emergency medicine

Physicians today need to be effective managers, as well as clinicians. In previous years, physicians gained managerial experience either through on-the-job training, degree programs, or continuing medical education courses. The specialty of emergency medicine began its first administrative fellowship in 1990 in California. Currently, three administrative fellowships exist nationally in emergency medicine. This article will describe the purpose of the fellowships and their curricula. Each fellowship has a different emphasis, with the goal to educate physicians who are interested in developing administrative skills to manage emergency departments or management groups or accept roles in hospital leadership. The existence of these fellowships will ideally influence the establishment of administrative fellowships in other specialties.     

Modeling Extreme Risks in Ecology

Extreme risks in ecology are typified by circumstances in which data are sporadic or unavailable, understanding is poor, and decisions are urgently needed. Expert judgments are pervasive and disagreements among experts are commonplace. We outline approaches to evaluating extreme risks in ecology that rely on stochastic simulation, with a particular focus on methods to evaluate the likelihood of extinction and quasi‐extinction of threatened species, and the likelihood of establishment and spread of invasive pests. We evaluate the importance of assumptions in these assessments and the potential of some new approaches to account for these uncertainties, including hierarchical estimation procedures and generalized extreme value distributions. We conclude by examining the treatment of consequences in extreme risk analysis in ecology and how expert judgment may better be harnessed to evaluate extreme risks.     

Ordering,Pricing, and Lead‐Time Quotation Under Lead‐Time and Demand Uncertainty

In this article, we study the newsvendor problem with endogenous setting of price and quoted lead‐time. This problem can be observed in situations where a firm orders semi‐finished product prior to the selling season and customizes the product in response to customer orders during the selling season. The total demand during the selling season and the lead‐time required for customization are uncertain. The demand for the product depends not only on the selling price but also on the quoted lead‐time. To set the quoted lead‐time, the firm has to carefully balance the benefit of increasing demand as the quoted lead‐time is reduced against the cost of increased tardiness. Our model enables the firm to determine the optimal selling price, quoted lead‐time, and order quantity simultaneously, and provides a new set of insights to managers.     

Gray Markets,A Product of Demand Uncertainty and Excess Inventory

Diverting large quantities of goods from authorized distribution channels to unauthorized or “gray market” channels, albeit legal, significantly affects both firms and consumers due to effects on price, revenue, service and warranty availability, and product availability. In this paper we consider mechanisms by which the uncertainty surrounding inventory ordering decisions drives gray markets. We start with a minimal stochastic supply chain model composed of a producer and a retailer; then we restructure the model to add a distributor whereby the distributor and authorized retailer have the option of diverting inventory to a gray market. Our analysis sheds light on three issues: impacts of diversion on the various supply chain participants, strategies producers could use to combat or exploit gray markets, and important considerations for authorized retailers trying to set optimal order quantities in the presence of a gray market. Our analysis yields new insights into the behavior and impact of gray markets, which can inform management strategies and policies for confronting them.     

Variational Bayes with synthetic likelihood

Synthetic likelihood is an attractive approach to likelihood-free inference when an approximately Gaussian summary statistic for the data, informative for inference about the parameters, is available. The synthetic likelihood method derives an approximate likelihood function from a plug-in normal density estimate for the summary statistic, with plug-in mean and covariance matrix obtained by Monte Carlo simulation from the model. In this article, we develop alternatives to Markov chain Monte Carlo implementations of Bayesian synthetic likelihoods with reduced computational overheads. Our approach uses stochastic gradient variational inference methods for posterior approximation in the synthetic likelihood context, employing unbiased estimates of the log likelihood. We compare the new method with a related likelihood-free variational inference technique in the literature, while at the same time improving the implementation of that approach in a number of ways. These new algorithms are feasible to implement in situations which are challenging for conventional approximate Bayesian computation methods, in terms of the dimensionality of the parameter and summary statistic.     

From Serodiscordant to Magnetic: The Feasibility and Acceptability of a Pilot Psychoeducational Group Intervention Designed to Improve Relationship Quality

Serodiscordant or magnetic couples experience HIV-related issues that can compound daily stressors. Psychoeducational couples group interventions can build coping skills and increase relationship satisfaction. Throughout Summer 2014, 6 gay male magnetic couples (n = 12) collaboratively designed and participated in an 8-session psychoeducational support group. The intervention was feasible (i.e., recruitment was <2 weeks, it was easy to coordinate) and acceptable (i.e., each session was consistently rated very good or outstanding). Relationship quality improved significantly in all couples regardless of whether couples agreed on how to manage HIV within their relationship. Implementation of this model is encouraged to fully evaluate this promising intervention.     

Men’s Migration and Women’s Fertility in Rural Mozambique

Labor migration profoundly affects households throughout rural Africa. This study looks at how men’s labor migration influences marital fertility in a context where such migration has been massive while its economic returns are increasingly uncertain. Using data from a survey of married women in southern Mozambique, we start with an event-history analysis of birth rates among women married to migrants and those married to nonmigrants. The model detects a lower birth rate among migrants’ wives, which tends to be partially compensated for by an increased birth rate upon cessation of migration. An analysis of women’s lifetime fertility shows that it decreases as the time spent in migration by their husbands accrues. When we compare reproductive intentions stated by respondents with migrant and nonmigrant husbands, we find that migrants’ wives are more likely to want another child regardless of the number of living children, but the difference is significant only for women who see migration as economically benefiting their households. Yet, such women are also significantly more likely to use modern contraception than other women. We interpret these results in light of the debate on enhancing versus disrupting effects of labor migration on families and households in contemporary developing settings.     

Newborn Infants' Preference for Attractive Faces: The Role of Internal and External Facial Features

Several previous experiments have found that newborn and young infants will spend more time looking at attractive faces when these are shown paired with faces judged by adults to be unattractive. Two experimental conditions are described with the aim of finding whether the “attractiveness effect” results from attention to internal or external facial features, or both. Pairs of attractive and less attractive faces (as judged by adults) were shown to newborn infants (mean age 2 days, 9 hours), where each pair had either identical internal features (and different external features) or identical external features (and different internal features). In the latter, but not the former, condition the infants looked longer at the attractive faces. These findings are clear evidence that newborn infants use information about internal facial features in making preferences based on attractiveness. It is suggested that when newborn (and older) infants are presented with facial stimuli, whether dynamic or static, they are able to attend both to internal and external facial features.