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This paper extends the work of Gehrlein and Fishburn (1976) and Gehrlein (1982) by providing a general theorem relating to the analytical representation of the probability of an event in a given space of profiles. It applies to any event characterized by a set of linear inequalities regardless of whether the coefficients defining the inequalities are integer or fractional coefficients. An algorithm for the probability calculation is also suggested. This suggested methodology is used to provide a complete characterization of the vulnerability properties of the four scoring rules studied in Lepelley and Mbih (1994) to manipulation by coalitions in a 3-alternative n-agent society. Received: 21 October 1997/Accepted 19 November 1998 相似文献
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Middle class fractions, childcare and the 'relational' and 'normative' aspects of class practices 总被引:1,自引:0,他引:1
Stephen J. Ball Carol Vincent Sophie Kemp Soile Pietikainen 《The Sociological review》2004,52(4):478-502
The emphasis in class research remains on the structural aspects of class, class processes are neglected. This paper focuses upon some relational and normative aspects of class through an examination of social divisions produced and constructed within middle class families’ choices of childcare. Working with data from two contrasting settings in London (Battersea and Stoke Newington) three issues are addressed in the paper; the extent to which childcare arrangements both substantively and structurally position children differently within long term educational careers; the ways in which the use of choice in a market system of child care and education, works to produce patterns of social closure that quietly discriminate via the collectivist criterion of class and racial membership; and the ways in which child care choices also point‐up and perpetuate subtle distinctions and tensions of values and lifestyle within the middle class, between class factions. Concepts drawn from the work of Bourdieu are deployed throughout. 相似文献
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Detlof von Winterfeldt Thomas Eppel John Adams Raymond Neutra Vincent DelPizzo 《Risk analysis》2004,24(6):1487-1502
Over the past 20 years, several epidemiological studies have found an association between exposure to electromagnetic fields (EMFs) and health effects, including childhood leukemia and adult brain cancer. However, experts strongly disagree about whether this association is causal and, if so, how strong it is. In this article, we examine several alternatives to reduce EMFs from sources of the California power grid, including undergrounding distribution and transmission lines and reconfiguring or rephasing lines. The alternatives were evaluated in terms of the potential health risk reduction, cost, impacts on service reliability, property values, and many other consequences. Because of the uncertainty about an EMF-health link, the main effort was to determine the sensitivity of the decisions to the probability and seriousness of an EMF hazard. User-friendly computer models were developed to allow stakeholders to change the model assumptions and parameters to analyze the impacts of their own assumptions and estimates on the decision. The analysis clearly demonstrated that only four of the many concerns raised by the stakeholders could make a difference in the decision: health risks, costs, service reliability, and property values. Whether undergrounding, moderate alternatives for EMF reduction, or no change was the best decision depended on a few key factors, including the probability that EMF exposure is a hazard, the severity of this hazard, how the EMF reduction measures are financed, and the impacts on property values. While the analysis did not resolve the EMF issues, it showed that even in the most controversial settings, a little analysis goes a long way to clarifying the issues and to focus the debate. 相似文献
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Vincent Jeffries Barry V. Johnston Lawrence T. Nichols Samuel P. Oliner Edward Tiryakian Jay Weinstein 《The American Sociologist》2006,37(3):67-83
Conclusion This article has presented a vision of what a field of altruism and social solidarity could potentially involve. An additional
perspective on the nature of this field and how it could contribute to the discipline and to society is provided by the science
of psychology. In the last decade a fundamental new orientation has developed in this discipline, growing from the pioneering
work of Martin E.P. Seligman. Generally identified as “positive psychology” it represents a shift from a focus on trying to
understand and find solutions to mental illness and various pathologies of thought and behavior in a “disease model” to a
focus on human strengths, virtues, and other positive characteristics. This shift in focus is regarded as making a direct
contribution to understanding what is best in human emotions and traits and how society can support the psychological flourishing
of individuals. This new perspective in turn provides increased awareness of how the problems studied in the disease model
can more effectively be prevented (Seligman, 2003, 2005). The importance of this focus on the positive for sociology and a
call to action is stated by Seligman (2003): The third pillar of positive psychology is the study of positive institutions
and positive communities. 相似文献
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