Semi‐parametric Estimation in a Single‐index Model with Endogenous Variables

We consider a semiparametric single‐index model and suppose that endogeneity is present in the explanatory variables. The presence of an instrument is assumed, that is, non‐correlated with the error term. We propose an estimator of the parametric component of the model, which is the solution of an ill‐posed inverse problem. The estimator is shown to be asymptotically normal under certain regularity conditions. A simulation study is conducted to illustrate the finite sample performance of the proposed estimator.     

Sterile water injections for childbirth pain: An evidenced based guide to practice

Background

About 30% of women in labour suffer from lower back pain. Studies of sterile water injections for management of low back pain have consistently shown this approach to be effective. The objective of this evidence-based guide is to facilitate the clinical use of sterile water injections to relieve lower back pain in labouring women.

Is Freedom Just About the Absence of Inhibitions,or Also About the Availability of Options?

Social Indicators Research -     

Jokes and routines make everyday life a good life—on ‘doing family’ for young people in foster care in Sweden

The aim of this article is to identify inclusion practices in foster families by studying the everyday life of young people entering various types of foster family. Structure and warmth in the family stand out as important dimensions of everyday life. What is not so evident in previous research is the way emotional ‘warmth’ is created. In particular, joking, gentle teasing and laughing, which in this paper stand out as important inclusion practices, seem to be rather unknown aspects in foster care, as is the importance of doing things together in everyday life. The young people's contributions in creating a good family atmosphere are visible in the study, as is their capacity to adapt to a new family. Daily routines normalise the adolescents' everyday life. Negotiations make them part of important decisions, and may strengthen them as social agents. Foster parents' positive attitude towards birth family facilitates birth parents' support to their children. In this case study, mixed qualitative methods are used: interviews, network maps, ‘beepers’ and video recordings in the foster home.     

An application of the Impact Evaluation Process for designing a performance measurement and evaluation framework in K-12 environments

This article illustrates the application of the Impact Evaluation Process for the design of a performance measurement and evaluation framework for an urban high school. One of the key aims of this framework is to enhance decision-making by providing timely feedback about the effectiveness of various performance improvement interventions. The framework design process is guided by the Impact Evaluation Process, and included the participation of key stakeholders including administrative and teaching staff who all contributed to the performance measurement and evaluation framework design process. Key performance indicators at the strategic, tactical, and operational levels were derived from the school vision, and linked to specific interventions to facilitate the continuous evaluation and improvement process.     

Interethnische Freundschaften in Deutschland

This paper examines interethnic friendships between immigrants or their descendants and the majority population in Germany. The focus is on differences in cross-ethnic contacts across immigrant groups and generations. The contribution addresses the conditions which lead to differential patterns in interethnic ties and considers arguments related to opportunities, preferences and third parties. Using the German Socio-Economic Panel Study (SOEP) the longitudinal analyses reveal increasing shares of interethnic friendships across generations. At the same time, substantive differences between immigrant groups emerge: Whereas Turks less often name German friends, resettlers from Poland and the Former Soviet Union as well as immigrants from Southern European origins, more often interact with members of the German majority. These differences are related above all to German language skills and, in the case of resettlers, also to a strong orientation towards the destination country. Structural and social conditions matter as well. When considering these aspects, the initial differences largely disappear.     

Focused information criteria for copulas

In this paper, we extend the focused information criterion (FIC) to copula models. Copulas are often used for applications where the joint tail behavior of the variables is of particular interest, and selecting a copula that captures this well is then essential. Traditional model selection methods such as the Akaike information criterion (AIC) and the Bayesian information criterion (BIC) aim at finding the overall best‐fitting model, which is not necessarily the one best suited for the application at hand. The FIC, on the other hand, evaluates and ranks candidate models based on the precision of their point estimates of a context‐given focus parameter. This could be any quantity of particular interest, for example, the mean, a correlation, conditional probabilities, or measures of tail dependence. We derive FIC formulae for the maximum likelihood estimator, the two‐stage maximum likelihood estimator, and the so‐called pseudo‐maximum‐likelihood (PML) estimator combined with parametric margins. Furthermore, we confirm the validity of the AIC formula for the PML estimator combined with parametric margins. To study the numerical behavior of FIC, we have carried out a simulation study, and we have also analyzed a multivariate data set pertaining to abalones. The results from the study show that the FIC successfully ranks candidate models in terms of their performance, defined as how well they estimate the focus parameter. In terms of estimation precision, FIC clearly outperforms AIC, especially when the focus parameter relates to only a specific part of the model, such as the conditional upper‐tail probability.     

What is a family? Constructions of family and parenting after a custody transfer from birth parents to foster parents

The subject of stability for children in long‐term foster care is an emerging field within social work with vulnerable children. In Sweden, the adoption of foster children is not a common occurrence. Instead, when a child has been placed in foster care for 3 years, the local social welfare committee will consider whether the custody of the child should be transferred to the foster parents regardless of the circumstances of the birth parents, in order to secure stability and a sense of family belonging. Consequently, custody transfers raise questions such as “who is family?” and “who is a parent?” This qualitative interview study with custodians and young people who have experienced custody transfer highlights that who counts as family and as a parent is ambiguous. This article draws attention to how negotiations about family and parenthood revolve around biological, emotional, and relational dimensions. Furthermore, we show that stability for children in care has to be understood in terms of processes over time and not as the result of a single decision of custody transfer. Consequently, social workers need to take several aspects into account when they assess family belonging and stability for children in foster care.     

Story‐Making as Methodology: Disrupting Dominant Stories through Multimedia Storytelling

In this essay, we discuss multimedia story‐making methodologies developed through Re?Vision: The Centre for Art and Social Justice that investigates the power of the arts, especially story, to positively influence decision makers in diverse sectors. Our story‐making methodology brings together majority and minoritized creators to represent previously unattended experiences (e.g., around mind‐body differences, queer sexuality, urban Indigenous identity, and Inuit cultural voice) with an aim to building understanding and shifting policies/practices that create barriers to social inclusion and justice. We analyze our ongoing efforts to rework our storytelling methodology, spotlighting acts of revising carried out by facilitators and researchers as they/we redefine methodological terms for each storytelling context, by researcher‐storytellers as they/we rework material from our lives, and by receivers of the stories as we revise our assumptions about particular embodied histories and how they are defined within dominant cultural narratives and institutional structures. This methodology, we argue, contributes to the existing qualitative lexicon by providing innovative new approaches not only for chronicling marginalized/misrepresented experiences and critically researching selves, but also for scaffolding intersectional alliances and for imagining more just futures.     

Covering Clinton (2010–2015): meaning-making strategies in US magazine covers

With a trailblazing political career, Hillary Clinton has been the focus of media attention for decades. This study examines 21 US magazine covers of the former First Lady and 2016 Democratic presidential candidate from 2010 through 2015—prior to her official bid for presidency—to investigate what these depictions of Clinton say about her and the relationship between gender, power, and politics. Based on a visual discourse analysis, we found that Clinton is presented as power-hungry, emasculating, and a surreptitious politician, with these magazine covers both overtly and subtly warning citizens about her authenticity and ambition. Such coverage reinforces misogynistic representations that disadvantage female politicians.