Optimal paired comparison designs for first-order interactions

In many fields of applications paired comparisons are used in which either full or partial profiles of the alternatives are presented. For this situation we introduce an appropriate model and derive optimal designs in the presence of interactions when all attributes have the same number of levels.     

Child Health-Related Quality of Life and Parental Social Capital in Greece: An Exploratory Study

In this paper, we examined dimensions of child health-related quality of life in Greece in relation to parental assessments of neighbourhood social capital and social support networks. For the analysis, two main measures were used: (1) child self-reported health-related quality of life in ten dimensions, as measured by the KIDSCREEN questionnaire; (2) subjective measures of parental neighbourhood social capital and social support. Parental assessments of neighbourhood social capital and social support were both independently and positively associated with child self-reported health-related quality of life. However, they were not associated with the same dimensions of child well being, nor were they associated with all dimensions of child well being. These results suggest that greater attention in future research needs to be paid to the differential associations between the various dimensions of social capital and child health-related quality of life, with clear focus implications for social and health policies.     

Linking maternal psychopathology to children's excessive crying and sleeping problems in a large representative German sample—The mediating role of social isolation and bonding difficulties

Attaining self-regulation is a major developmental task in infancy, in which many children show transient difficulties. Persistent, clinically relevant difficulties in self-regulation include excessive crying or sleeping disorders. Many families with affected children are burdened with multiple psychosocial risk. This suggests that regulatory problems are best conceptualized as the maladaptive interplay of overly burdened parents and a dysfunctional parent–child interaction. The current study examines whether social isolation and bonding difficulties function as mediating mechanisms linking maternal psychopathology to (1) children's excessive crying and (2) sleeping problems. The sample comprised N = 6598 mothers (M = 31.51 years) of children between zero to three years of age (M = 14.08 months, 50.1% girls). In addition to socio demographic data, the written questionnaire included information on maternal depression/anxiety, isolation, bonding, and children's regulatory problems. Hypotheses were tested with a mediation model controlling for psychosocial risk and child characteristics. As expected, maternal symptoms of depression/anxiety were linked to infants‘ excessive crying and sleeping problems. Social isolation and bonding difficulties mediated this association for excessive crying as well as for sleeping problems, but social isolation was a single mediator for sleeping problems only. The findings provide important insights in the mediating pathways linking maternal psychopathology to children's regulatory problems.     

A Comparative Evaluation of Labor Tour Scheduling Methods

This paper presents an initial study of relative performance for a number of the labor tour scheduling heuristic methods proposed in the literature. These heuristic methods were classified as either linear programming (LP) based or construction. Each of the methods was applied to a tour scheduling problem, subject to a variety of labor demand requirements distributions, with the singular objective being the minimization of total labor hours scheduled. Statistical analysis revealed that effective tour schedule solutions were generated by both LP-based and construction methods. Since the performances of the Keith [13], Morris and Showalter [18], and Bechtold and Showalter [5] methods were superior, their solutions were also compared across a number of secondary criteria. An overall analysis of the performances of these three methods resulted in the identification of a number of important managerial and decision-making issues. We conclude that service operations management should consider integrating these heuristic methods into a decision support system. Finally, suggestions for future research are provided.     

After Breast Cancer: Sexual Functioning of Sexual Minority Survivors

Research on sexual difficulties after cancer has neglected sexual minority women (SMW); for example, lesbian and bisexual women. Clinicians treating these women are therefore at a disadvantage as they lack information about sexual problems in this population. This study tested the hypothesis that SMW with breast cancer have poorer sexual function than SMW without breast cancer, distinguishing partnered from unpartnered women. Using convenience sample recruitment, we conducted a case-control study to compare survivors of breast cancers who are SMW, in other words, cases to controls, that is, SMW without cancer. Anonymous survey data were collected from 85 cases after they had completed active cancer treatment and 85 age- and partner-status matched controls with no history of any cancer. Participants' self-reported sexual frequency and sexual function measured by the Female Sexual Function Index were evaluated. Cases and controls did not differ in risk of sexual dysfunction or the level of overall sexual functioning; however, cases had lower sexual frequency and scored lower on desire and ability to reach orgasm, and higher on pain compared to controls. Results inform clinicians about sexual minority survivors' sexual domains affected by cancer. When discussing sexual problems and therapeutic options, sexual orientation should be ascertained.     

Confidence Sets Based on Thresholding Estimators in High-Dimensional Gaussian Regression Models

We study confidence intervals based on hard-thresholding, soft-thresholding, and adaptive soft-thresholding in a linear regression model where the number of regressors k may depend on and diverge with sample size n. In addition to the case of known error variance, we define and study versions of the estimators when the error variance is unknown. In the known-variance case, we provide an exact analysis of the coverage properties of such intervals in finite samples. We show that these intervals are always larger than the standard interval based on the least-squares estimator. Asymptotically, the intervals based on the thresholding estimators are larger even by an order of magnitude when the estimators are tuned to perform consistent variable selection. For the unknown-variance case, we provide nontrivial lower bounds and a small numerical study for the coverage probabilities in finite samples. We also conduct an asymptotic analysis where the results from the known-variance case can be shown to carry over asymptotically if the number of degrees of freedom n ? k tends to infinity fast enough in relation to the thresholding parameter.     

Far Away So Close: Race,Whiteness, and German Identity

Race and nation have been difficult concepts in Germany since the Holocaust. Although race has seemingly disappeared from public discourse, the concept is very present in the narrative construction of white German national identities. In fact in Germany, race, and more specifically whiteness, disappears into a national naming. On the basis of a qualitative study on women activists, I examine to what extent the research participants struggle with the racialized discourse on German identity and what this struggle looks like. Using John Hartigan's (2000 Hartigan, John Jr. 2000. Object lessons in whiteness: Antiracism and the study of white folks. Identities: Global Studies in Culture and Power, 7(3): 373–406. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) approach to analyzing ethnographic accounts of whiteness, I show how a racialization of German identity plays out in complex and complicated ways. On the one hand, the narratives are complicit with a racialized Germanness, yet on the other hand, the idea of a unified, white, cultural community is being challenged. To move toward a postcolonial narrative of Germanness that includes Germany's history of colonialism as well as fascism, we need to move away from race, but we also need to move toward race. A starting point would be provided by focusing on racism, not as a fringe issue of German society but rather as an urgent matter that is located at the centre of German politics and is actively shaping its history.     

MASTERING THE ART OF SOCIAL MEDIA

Online communication has become a central part in the communication repertoires of political actors in Western mass democracies. In Switzerland, where broadband, internet use, and media literacy are amongst the highest in the world, all major political parties run their own website and are active on social media. This article seeks to show how Swiss political parties deal with social media, how they implement it and how they use social media. The study builds on empirical data from a structural analysis of party websites, the official Facebook sites, and Twitter feeds. These social media sites were analysed for their resonance, update frequency, and thematic clusters focusing on information, mobilization, and participation. A weekly assessment of the user numbers illustrates the development of user resonance throughout the 2011 election year. While political parties claim to appreciate the dialogue and mobilization potentials of social media, they mainly use social media as an additional channel to spread information and electoral propaganda. The overall resonance is still on a very low level. The data seem to sustain the normalization hypothesis, as larger parties with more resources and voters are better able to generate effective communication and to mobilize online than small and marginal parties.