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131.
The paradox of new members occurs when the addition of one or more new members to a weighted voting body increases, rather than decreases, the voting power of some of the old members. Extending the computational work of Brams and Affuso (1976), the mean size of the paradox and the relative frequency of its occurrence are presented for small and moderate-size weighted voting bodies. Computational results are presented and conclusions are drawn for the two power indices of Shapley-Shubik and Banzhaf, three different decision rules, and voting bodies with or without dictator. Although the paradox cannot be dismissed as either contrived or improbable, its mean size in moderatesize voting bodies is sufficiently small to question its practical significance. 相似文献
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Richard A. Berk Susan B. Sorenson Douglas J. Wiebe Dawn M. Upchurch 《Analyses of Social Issues and Public Policy》2003,3(1):45-64
In this article, we examine the association between the legalization of abortion with the 1973 Roe v. Wade decision and youth homicide in the 1980s and 1990s. An interrupted time series design was used to examine the deaths of all U.S. 15- to 24-year-olds that were classified as homicides according to the International Classification of Diseases (codes E960-969) from 1970 to 1998. The legalization of abortion is associated over a decade later with a gradual reduction in the homicides of White and non-White young men. The effect on the homicides of young women is minimal. We conclude that the 1990s decline in the homicide of young men is statistically associated with the legalization of abortion. Findings are not consistent with several alternative explanations, such as changes in the crack cocaine drug market. It is almost inconceivable that in the United States of today, policies affecting the choice to have children would be justified as a means to control crime. Yet, if the legalization of abortion had this unintended effect, the full range of policy implications needs to be discussed. 相似文献
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Anna Yeatman and Joanna Penglase (August 2004) provide a useful review of the literature on ‘Looking After Children’ (LAC), a guided practice system for children living in out‐of‐home care. In summarising the polarised debate, the authors point to an unresolved situation in which advocates have uncritically adopted individualised care planning, as a way of improving outcomes in child welfare while critics have not offered alternatives for systemic reform. This is an area of troubled social policy and the debate cannot rest here. This paper suggests a number of pressing research questions to be addressed. The urgency of the issues and the characteristics of local service systems mean LAC needs to be evaluated in the Australian context, taking into account the local experience and participation of children, families and their social workers. 相似文献
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The Role of Child Emotionality in Child Behavior and Maternal Instruction on Planning Tasks 总被引:1,自引:0,他引:1
This study explored the relation of children's emotional functioning to children's behavior during individual planning and mother's and children's behaviors during joint planning. Participants were 118 mothers and their second‐grade children. Mothers rated children on their emotional intensity and children rated themselves on their use of emotion regulation strategies. Children and mother–child dyads were videotaped during planning tasks and independent observers rated their behavior. Child emotional intensity was directly related to children being less engaged in the task and to an emphasis in maternal instruction on regulatory behaviors. Some types of emotion regulation strategies modified these relations. Findings suggest that child emotionality may play an important role in the early school years in children's opportunities to learn during social‐cognitive activity. 相似文献
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Conservation psychology is defined as psychological research oriented toward understanding why people help or hurt the natural environment and promoting environmentally sustainable practices ( Saunders, 2003 ). Despite a growing body of research, the field is largely unfamiliar to many psychologists and to those working in the environmental field. Here we make a case for the importance of conservation psychology and describe a model for the social psychology of conservation behavior that focuses on situational context, existing schemas, and personal motives. We hope this model will be useful for policymakers and will prompt new psychological research on the topic of conservation. 相似文献