A graphical analysis of some basic results in social choice

We use a simple graphical approach to represent Social Welfare Functions that satisfy Independence of Irrelevant Alternatives and Anonymity. This approach allows us to provide simple and illustrative proofs of May's Theorem, of variants of classic impossibility results, and of a recent result on the robustness of Majority Rule due to Maskin (1995). In each case, geometry provides new insights on the working and interplay of the axioms, and suggests new results including a new characterization of the entire class of Majority Rule SWFs, a strengthening of May's Theorem, and a new version of Maskin's Theorem. Received: 31 July 1999/Accepted: 27 March 2001     

The Prevention of Social Aggression Among Girls

This study represents the first systematic attempt to examine a theory‐based program designed to reduce girls' social aggression and increase positive leadership among peers. Fifth‐grade girls from six public schools were randomly assigned within classrooms to the social aggression prevention program (SAPP) and the comparison reading clubs. A school‐based small group program, the SAPP was demonstrated to have a positive impact for all students in the domain of social problem solving. For students with high baseline social problems, teachers reported positive changes in SAPP participants' prosocial behavior. In addition, the content of the program was critical: reading club participants improved their reading achievement at greater rates than SAPP participants. Targeting female students in a program focused on resolving social conflicts from multiple perspectives may be an important addition to broader, multilevel initiatives to prevent aggression and promote leadership in schools.     

A body passes by: the flâneur and the senses in nineteenth-century London and Paris

Abstract

The flâneur is well-known for being the most emblematic nineteenth-century observer of urban life. Critics have often compared the flâneur to a camera eye which records everything and insisted on the predominance of sight over other senses in the cognitive process. This article emphasises the embodiedness of the flâneur’s vision, which is an experience of all the senses. Urban public space can be envisaged as a ‘metabolic space,’ in which “the links between background and figures are very unstable” (Augoyard 1991). The moving body of the flâneur, which can adapt to this changing space, seems to be in an ideal position to apprehend the metabolic body of the city. The flâneur is not only a “transparent eye-ball” (Emerson 2003), he is “a living eye” which communicates with all the other senses and captures the whole experience of moving through the city. By looking at texts by Balzac, Baudelaire, Dickens and Charlotte Brontë, the article shows that flânerie is a sensory activity that shapes our perception of the city as much as the city shapes our own flâneries by transforming our bodies into scribes who write the “thicks and thins of the urban text” (de Certeau, 1984).     

THE IMPACT OF SCHOOL RACIAL COMPOSITIONS ON NEIGHBORHOOD RACIAL COMPOSITIONS: EVIDENCE FROM SCHOOL REDISTRICTING

I use data surrounding public school redistricting to study how school racial compositions affect neighborhood racial compositions. This redistricting followed from the end of court‐ordered busing for racial desegregation, significantly changing the racial composition of the assigned school for many neighborhoods. Over a 5‐year period, the impact of an increase in the percent black of the assigned elementary school on the percent black of the neighborhood was positive. The effects increased over time, consistent with a simple model of short‐run neighborhood racial dynamics. These results have implications for potential effects of school racial desegregation policy changes on neighborhood racial compositions. (JEL H75, I28, R23)     

Education and training for social work: A response to Tony Novak

Novak's proposal (1995) that student social workers should be taught on the basis of how social work should be practised rather than how it actually is being practised within the current market economy, is challenged as an unhelpful ‘head in the sand’ approach to current dilemmas in social work education. The revised Diploma in Social Work (CCETSW, 1995a) is defended on the grounds that it prepares social workers for the jobs they will have to do on qualifying; that it retains a user-centred anti-racist and anti-discriminatory value basis and that, in spite of serious political threats, it remains rooted in higher education and emphasises the importance of holistic assessment and critical reflection in practice.     

The health of university athletes: attitudes, behaviors, and stressors

This study examined several aspects of the health of university athletes. Five areas of concern were targeted for investigation: general health background, use of drugs and alcohol, weight and eating behaviors, stress, and use of helping resources. The authors developed a questionnaire and used it to survey 27 varsity athletic teams at a major private university. The incidence of injuries was high; one third of the 247 student athletes surveyed reported sport-related injuries. Alcohol was much more frequently used than other drugs, and use tended to decrease during the competitive season. Significant differences between men and women athletes were found in off-season alcohol and marijuana use. Anabolic steroid abuse did not appear to be a major problem for this athlete population. Issues of diet, weight, and body image were found to be significantly different for women than for men. Although the incidence of bulimia and anorexia was low for both female and male athletes, it was clear that female athletes brought to their sport heightened concern for body image. The authors discuss the psychological and interpersonal implications that these findings have for the adjustment of female athletes. Injury and academics were perceived as the most stressful factors for both men and women, whereas weight and diet issues were a major stress factor for one third of the women. Given these data, specific recommendations are made for health professionals who work with college athletes.     

Exact calculation of power and sample size in bioequivalence studies using two one‐sided tests

The number of subjects in a pharmacokinetic two‐period two‐treatment crossover bioequivalence study is typically small, most often less than 60. The most common approach to testing for bioequivalence is the two one‐sided tests procedure. No explicit mathematical formula for the power function in the context of the two one‐sided tests procedure exists in the statistical literature, although the exact power based on Owen's special case of bivariate noncentral t‐distribution has been tabulated and graphed. Several approximations have previously been published for the probability of rejection in the two one‐sided tests procedure for crossover bioequivalence studies. These approximations and associated sample size formulas are reviewed in this article and compared for various parameter combinations with exact power formulas derived here, which are computed analytically as univariate integrals and which have been validated by Monte Carlo simulations. The exact formulas for power and sample size are shown to improve markedly in realistic parameter settings over the previous approximations. Copyright © 2014 John Wiley & Sons, Ltd.