Beyond tail median and conditional tail expectation: Extreme risk estimation using tail Lp-optimization

The conditional tail expectation (CTE) is an indicator of tail behavior that takes into account both the frequency and magnitude of a tail event. However, the asymptotic normality of its empirical estimator requires that the underlying distribution possess a finite variance; this can be a strong restriction in actuarial and financial applications. A valuable alternative is the median shortfall (MS), although it only gives information about the frequency of a tail event. We construct a class of tail L^p-medians encompassing the MS and CTE. For p in (1,2), a tail L^p-median depends on both the frequency and magnitude of tail events, and its empirical estimator is, within the range of the data, asymptotically normal under a condition weaker than a finite variance. We extrapolate this estimator and another technique to extreme levels using the heavy-tailed framework. The estimators are showcased on a simulation study and on real fire insurance data.     

The Vile and the Noble

This article examines the concept of terroir—a French word that captures the correspondence between the physical and human features of a place and the character of its agricultural products. Tied to the protection of economic rents threatened by competition and fraud, the practice of classifying certain lands, grapes, and properties both substantively and qualitatively has become the organizing principle of the entire French wine industry. Often derided as snobbish monopolistic practices by New World producers, the notion terroir in France and its rejection in America both exemplify how the “principles of vision and division” of the natural world are always intertwined with the “principles of vision and division” of the social world. The present article discusses these affinities through an analysis of wine classifications in the French regions of Bordeaux and Burgundy, and some of the critiques they have given rise to, in the United States especially.     

Impact of physical activity and sedentary behaviour on fall risks in older people: a systematic review and meta-analysis of observational studies

The objective of this work was to summarise and evaluate the evidence showing that physical activity is a protector factor as regards falls in older people. Relevant studies were identified through a systematic search in the MEDLINE and Cochrane Library, under the keywords of accidental fall/numerical data and risk factors, and with the bibliographies of retrieved papers. The combined odds ratio (OR) [95% confidence interval] for physical activity was 0.75 [0.64, 0.88] with moderate heterogeneity (I ²?=?33%). For fall injury, it was 0.59 [0.47, 0.74] and, for falls in general, it rose to 0.94 [0.76, 1.17] with nil heterogeneity. The combined OR for sedentary factors was 1.14 [1.10, 1.82] with moderate heterogeneity (I ²?=?36%). Regular physical activity in daily life yields significant reduction in falls in older people, especially falls with injuries.     

Being the best or doing the right thing? An investigation of positional,prosocial and conformist preferences in provision of public goods

Based on a simple theoretical framework, we show that when individuals exhibit positional, prosocial or conformist preferences which are endogenous, the end outcomes in terms of private provision of public goods can differ significantly from traditional neo-classical predictions. Indeed, when a given individual selects a specific subset of preferences according to what others do, he/she will contribute positively to the public good provision. We provide anecdotal evidence to support our theoretical analysis by using data from an Internet survey on a sample of French individuals. Analyses of individual responses confirm our theoretical arguments. For instance, we show that relative concerns matter, that is, for several environmental goods, people might prefer polluting more in absolute terms but less than others in society. Moreover, we also test whether people exhibit a social desirability bias and show that they attribute more (less) positional (prosocial) concerns to others in society.     

Reporting Errors in Siblings’ Survival Histories and Their Impact on Adult Mortality Estimates: Results From a Record Linkage Study in Senegal

Estimates of adult mortality in countries with limited vital registration (e.g., sub-Saharan Africa) are often derived from information about the survival of a respondent’s siblings. We evaluated the completeness and accuracy of such data through a record linkage study conducted in Bandafassi, located in southeastern Senegal. We linked at the individual level retrospective siblings’ survival histories (SSH) reported by female respondents (n = 268) to prospective mortality data and genealogies collected through a health and demographic surveillance system (HDSS). Respondents often reported inaccurate lists of siblings. Additions to these lists were uncommon, but omissions were frequent: respondents omitted 3.8 % of their live sisters, 9.1 % of their deceased sisters, and 16.6 % of their sisters who had migrated out of the DSS area. Respondents underestimated the age at death of the siblings they reported during the interview, particularly among siblings who had died at older ages (≥45 years). Restricting SSH data to person-years and events having occurred during a recent reference period reduced list errors but not age and date errors. Overall, SSH data led to a 20 % underestimate of ₄₅ q ₁₅ relative to HDSS data. Our study suggests new quality improvement strategies for SSH data and demonstrates the potential use of HDSS data for the validation of “unconventional” demographic techniques.     

Introduction to the Special Issues on the Supervision of Staff and Field Education of Students

Two Special Issues of the Clinical Social Work Journal have been dedicated to building on the social work discipline’s tradition and commitment to the supervision of staff and field education of students. These issues bring together contemporary theorizing, clinical supervisory and field education practice experience and wisdom, and research studies to contribute to the knowledge base for practicing supervisors and field educators. As the first of the Special Issues, this issue has been dedicated to the supervision of staff. In this Introduction, we share the salient aspects of the articles published, as they relate to contemporary social work supervision, relational considerations within the supervisory dyad, models of supervision for fields of specialization, as well as measurement and evaluation. Implications are shared, with highlights and connections for practicing supervisors made throughout.     

Feasibility of Implementation of a Parenting Intervention with Karen Refugees Resettled from Burma

Parents and children exposed to war and relocation have high rates of negative relational and mental health outcomes. This study tested the feasibility of implementing an adapted evidence‐based parenting intervention for contexts of trauma and relocation stress. Eleven Karen refugee caregivers from Burma participated in the intervention. Participants and a focal child completed ethnographic interviews as well as structured assessments at baseline and follow‐up. Caregivers reported changes in their teaching, directions, emotional regulation, discipline, and child compliance. Children reported changes in these areas and in positive parent involvement. Caregivers reported higher mental health distress immediately after the intervention, potentially due to increased awareness. Researchers made personalized referrals for counseling services as needed. Children reported a decrease in mental health symptoms.     

Twinning Rates in Developed Countries: Trends and Explanations

The twinning rate has increased dramatically over the last four decades in developed countries. Two main factors account for this increase: delayed childbearing, as older women tend to have twins more frequently than younger ones, and the expansion of medically assisted reproduction (MAR), which carries an increased probability of multiple births. Using civil registration data, we estimate the share of the increase in twinning rates attributable to the rise in the age at childbearing and to MAR. The effect of MAR is estimated to be about three times as important as the effect of delayed childbearing. Negative health outcomes associated with multiple births and the cost of MAR have raised concerns. We find that in one‐quarter of developed countries with the relevant data, the twinning rate reached a plateau around the early 2000s and decreased thereafter. We examine the reasons for this reversal, in particular changes in MAR policies and practices.     

Teaching Note—Social Work Serial: Using Video-Recorded Simulated Client Sessions to Teach Social Work Practice

Simulation, the use of trained actors as simulated clients, has gained empirical support as an effective teaching and assessment method in social work education. The associated costs involving the use of live simulation, however, often pose a barrier and prevent less resourced schools from implementing this pedagogical approach in the classroom. Social Work Serial is a pedagogical project that used video-recorded simulated client sessions as an alternative to live simulation. In this teaching note, we will describe step-by-step production and implementation processes involving the project and discuss the implications of video-based simulation for social work education.