Longitudinal Test of a Multiple Domain Model of Adolescent Condom Use

A comprehensive multiple domain model (MDM) to understand condom use in adolescents was proposed and tested using structural equation modeling of data at three time points. The proposed model integrates social psychological theory, demographic and personality factors, social environment, and situational/contextual variables. Adolescents who were sexually active at time 2 (6 months after baseline) and time 3 (1 year after time 2) and completed surveys at all three time points were included in the analyses (N = 511). An iterative process of model testing resulted in a structural equation model that provided a good fit to the data (CFI = .92, RMSEA = .04). Models comparing gender and race as moderators also were calculated and supported the generalizability of the model. Results provide support for an MDM that goes beyond traditional social psychological models for a broader understanding of condom use in adolescents. Implications for further theory testing and safer sexual interventions are discussed.     

Entscheidungsunterstützung unter Berücksichtigung der Anforderungen von Entscheidungsträgern am Beispiel der Gestaltung von optionalen Girokonto-Tarifen

Quantitative decision models are used only if managers’ implementation conditions are met. Decision makers want tools that offer a set of good solutions so that they can evaluate different solutions according to various objectives without being forced to make their trade-offs explicit in a functional form. This also allows taking into account strategic aspects that cannot be modeled otherwise. In such situations, heuristics are needed which derive solutions from the structure and not so much from the mathematical properties. We present such a decision support tool for the problem of determining a menu of optional tariffs for checking accounts. The heuristic is based on the idea that for reasonably separable preferences across segments it is the best to offer for each segment the most preferred product. We use latent class choice-based conjoint analysis to estimate customer preferences and develop a customized choice-based conjoint design to take differences in individual demand into account. The proposed heuristic was used to support an actual decision problem for which the profit contribution has been increased substantially without having faced a considerable loss of customers.     

A new preventive intervention for children of substance‐abusing parents: Results of a randomized controlled trial

Children of substance‐abusing parents (COS) are at risk for developing psychosocial problems. We evaluated the effectiveness of the manualized, 9‐session psycho‐educational preventive intervention “TRAMPOLINE” (PE) for 8–12‐year‐old COS compared with a non‐educational “fun and play” group (NE) of equal length delivered by social workers in 27 German counselling centres. A randomized controlled trial was conducted to compare PE (n = 130) and NE (n = 88) outcomes at baseline, post intervention, and 6‐month follow‐up. Primary outcomes were related to stress and coping; secondary were also examined. Analyses were conducted using baseline‐adjusted repeated measures linear mixed models. Five outcomes revealed improvements both in PE and NE, four of which were more pronounced in PE, and one more pronounced in NE. Small but significant group differences in favour of PE were found in “social isolation” and “addiction‐related knowledge.” Children from both groups reported reduced mental distress, reduced avoidance in coping with family stress, improved self‐perceived autonomy, and a better parent–child relationship. No changes were observed in self‐efficacy, physical stress symptoms, and in other health‐related quality of life aspects. TRAMPOLINE can instill positive changes in COS by reducing mental distress and social isolation.     

The European flexicurity concept and the Dutch and Danish flexicurity models: How have they managed the Great Recession?

In the mid‐2000s, the flexicurity concept was developed into a key EU policy concept. It drew its inspiration from the Danish and Dutch practices to combine labor market flexibility and security. However, the crisis' focus on bringing down national deficits and debts left little room to advance the concept. Lately, more emphasis has been placed on the need to take into consideration the social aspect of economic policy‐making. Current EU level documents see flexicurity as a guidance for structural reforms. However, the European flexicurity initiatives seem never to have had much impact in Denmark and the Netherlands. There are few accounts of the recent adjustment to the flexicurity models, be it at the EU or at national levels. Therefore, this article assesses the fate of flexicurity by scrutinizing its (adjusted) use as a political concept as well as a socio‐economic model. Although the Danish flexicurity model resembles the European flexicurity concept to a large extent, recent reforms have, overall, weakened rather than strengthened the flexicurity model. The Dutch flexicurity model has a narrower focus on normalizing atypical work, while recent reforms support this narrow flexicurity model. Meanwhile, the EU level concept has been changing every year, encompassing a growing number of issues.     

Walking the Dog: The Effect of Pet Ownership on Human Health and Health Behaviors

This analysis explores whether pet owners have better physical health outcomes, and if so, whether the positive physical health benefits are explained by better health behaviors that result from having to take care of the pet’s physical needs. Data come from the National Health and Nutrition Examination Survey, a representative sample of the non-institutionalized United States population. Analyses were limited to persons living alone (n = 2,474) in order to isolate primary pet caretakers from those merely living in a pet household. Results showed that pet owners, particularly dog and cat owners, had more positive physical health outcomes when compared to non pet owners or those owning other types of pets. Surprisingly, the effect of pet ownership was not mediated by health behaviors such as recreational walking. However, the health benefits of pet ownership were largely reduced once sociodemographic variables such as age, socioeconomic status, and residential location were controlled. The positive health effects of pet ownership appear to be primarily the result of selection, not increased physical activity associated with the active caretaking of pets.     

Internalizing Symptoms,Peer Substance Use,and Substance Use Initiation

This study used longitudinal survey and social network data covering sixth through ninth grades to test whether internalizing symptoms make early adolescents more prone to (1) exposure to and (2) influence by substance‐using peers. Random effects regressions revealed that increases in symptoms were significantly associated with increases in the proportion of friends who used cigarettes, alcohol, and marijuana; some associations weakened across grades. Event history models revealed that the effect of friends' smoking on smoking initiation decreased as internalizing symptoms increased; symptoms did not moderate the effects of friends' alcohol and marijuana use on alcohol and marijuana use initiation. These findings counter the influence hypothesis of the co‐occurrence of internalizing symptoms with substance use and partly support the exposure hypothesis.     

Outlier Identification Procedures for Contingency Tables using Maximum Likelihood and L1 Estimates

Abstract.  Observed cell counts in contingency tables are perceived as outliers if they have low probability under an anticipated loglinear Poisson model. New procedures for the identification of such outliers are derived using the classical maximum likelihood estimator and an estimator based on the L ₁ norm.     

Extended Analysis and Evidence Integration of Chloroprene as a Human Carcinogen

β-Chloroprene is used in the production of polychloroprene, a synthetic rubber. In 2010, Environmental Protection Agency (EPA) published the Integrated Risk Information System “Toxicological Review of Chloroprene,” concluding that chloroprene was “likely to be carcinogenic to humans.” This was based on findings from a 1998 National Toxicology Program (NTP) study showing multiple tumors within and across animal species; results from occupational epidemiological studies; a proposed mutagenic mode of action; and structural similarities with 1,3-butadiene and vinyl chloride. Using mouse data from the NTP study and assuming a mutagenic mode of action, EPA calculated an inhalation unit risk (IUR) for chloroprene of 5 × 10⁻⁴ per µg/m³. This is among the highest IURs for chemicals classified by IARC or EPA as known or probable human carcinogens and orders of magnitude higher than the IURs for carcinogens such as vinyl chloride, benzene, and 1,3-butadiene. Due to differences in pharmacokinetics, mice appear to be uniquely responsive to chloroprene exposure compared to other animals, including humans, which is consistent with the lack of evidence of carcinogenicity in robust occupational epidemiological studies. We evaluated and integrated all lines of evidence for chloroprene carcinogenicity to assess whether the 2010 EPA IUR could be scientifically substantiated. Due to clear interspecies differences in carcinogenic response to chloroprene, we applied a physiologically based pharmacokinetic model for chloroprene to calculate a species-specific internal dose (amount metabolized/gram of lung tissue) and derived an IUR that is over 100-fold lower than the 2010 EPA IUR. Therefore, we recommend that EPA's IUR be updated.     

Struktur und Entwicklung der Rechnungslegungsforschung in deutschen wissenschaftlichen Zeitschriften

Against the dynamic background of the convergence of German financial accounting standards to its international counterparts as well as an increasingly internationally oriented accounting research, the authors of this article seek to present a contribution to improve our understanding of the structure and development of German financial accounting research. To this end, they analyse the co-citation patterns of 681 research articles on financial accounting topics published between 1970 and 2007 in four leading German academic journals. The study’s findings show that while the structure of German financial accounting research has experienced profound change over time it is still different from that in international accounting research.