A Social Choice Lemma on Voting Over Lotteries with Applications to a Class of Dynamic Games

We prove a lemma characterizing majority preferences over lotteries on a subset of Euclidean space. Assuming voters have quadratic von Neumann–Morgenstern utility representations, and assuming existence of a majority undominated (or “core”) point, the core voter is decisive: one lottery is majority-preferred to another if and only if this is the preference of the core voter. Several applications of this result to dynamic voting games are discussed.This paper was completed after Jeff Banks’s death. John Duggan is deeply indebted to him for his friendship and his collaboration on this and many other projects.     

Cognitive therapy and behavioural coping in the management of work-related stress: An intervention study

Transactional models of stress emphasize the importance of cognitive appraisal of potential stressors in the determination of the stress response. This appraisal can be modified by the use of techniques normally associated with cognitive therapy. The contribution of a specifically cognitive component when intervening in work-related stress has not been well evaluated to date. This research seeks to determine the effectiveness of stress management training in the treatment of the work-related effects of stress by comparing the role of modifying dysfunctional cognitions with the teaching of appropriate behavioural coping strategies. Participants were allocated to one of two intervention conditions or to a waiting list control group. Those in the intervention conditions received group stress management either with the focus on delivering cognitive therapy techniques or with the focus on behavioural coping skills. Measures of general health were taken at the beginning and end of intervention and at 3-month follow-up. Participants in the cognitive therapy groups who were reporting symptoms of general ill-health at the start of the intervention showed a significant improvement at follow-up. Cognitive therapy appears to have been an effective intervention in work-related stress. Those in the behavioural group showed a smaller but still clinically effective improvement. Results are discussed in terms of methodological issues and implications for future research. It is suggested that changes in cognitive appraisal may need to be developed.     

Higher order moments of order statistics from INID symmetric random variables

In this paper we present analogues of Balakrishnan's (1989) relations that relate the triple and quadruple moments of order statistics from independent and nonidentically distributed (I.NI.D.) random variables from a symmetric distribution to those of the folded distribution. We then apply these results, along with the corresponding recurrence relations for the exponential distribution derived recently by Childs (2003), to study the robustness of the Winsorized variance.     

Dyadic Adjustment and Community Involvement in Same-Sex Couples

This study examines the effects of age and involvement in the gay, lesbian, and bisexual community on dyadic adjustment in 62 male and 54 female same-sex couples. Participants completed the Dyadic Adjustment Scale (Spanier, 1976) and scales of political and social involvement in the gay, lesbian, and bisexual community based on Peplau and Cochran (1981). Those in midlife (35 years and older) had significantly lower conflict in matters of affection and sex than those younger (less than 35 years old). Political involvement interacted significantly with gender and age in predicting dyadic consensus scores: Among younger women, greater political involvement was associated with higher dyadic consensus. Inter-partner differences in social involvement were significantly associated with greater dyadic conflict in sex and affection. Inter-partner dyadic adjustment and community involvement scores were positively correlated, in general. Findings support the importance of age in the study of same-sex couples. The implications for conceptualizations of the gay, lesbian, and bisexual communities and dyadic adjustment are discussed.     

Line transects of two-dimensional random fields: Estimation and design

In line-transect sampling data are collected continuously along the path travelled. These data are then used to estimate some characteristic of an entire region. We model the characteristic of the region as a linear functional of Z(), a realization of a random field, and our data as the values of Z(x) for x along the path. We study how to estimate the characteristic of interest and how to choose the path to accurately estimate it.     

ALAIN TOURAINE, MANUEL CASTELLS AND SOCIAL MOVEMENT THEORY: A CRITICAL APPRAISAL

The "action theory" of Alain Touraine and Manuel Castells' theory of urban movements together constitute a social movement paradigm which differs significantly from both the traditional collective behavior explanation and the newer resource mobilization model. In this paper, the Touraine-Castells perspective is contrasted to the existing approaches with reiation to social movement causes, characteristics, and outcomes. It is argued that the work of this "French School" represents a partial realization of Traugott's (1978) attempt to reconceptualize social movements as distinct phenomena integrally linked to the analysis of social change outside institutional channels.     

Foster parent perceptions of placement breakdown

The purpose of the study was to describe the perceived causes of placement breakdown by foster parents. Sixty-three foster parents from fifty families were asked to describe their challenges in response to the following question: “What would make you consider ending a foster placement”? The responses to this question were analyzed using multidimensional scaling and cluster analysis, to yield nine themes. Foster parents indicated that they would consider ending a placement if there was a danger to their family, if the child could not adapt to the home or if they could not handle the child's behavior. Participants reported that the complex health needs of a foster child, problems dealing with the foster agency, and several unsuccessful attempts to make the placement work would cause a placement to breakdown. Foster parents also indicated that they would consider ending a placement if their personal circumstances changed, their own health deteriorated, or there was a lack of appropriate external support in place. The results of the study point to gaps in the research on violence in general foster care, foster parent perceptions of contributions to a foster child's transition back to his or her birth family, and the process of foster parent decision-making in cases of placement breakdown.