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41.
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. 相似文献
42.
Jeffrey S. Banks 《Social Choice and Welfare》1995,12(3):293-310
This paper characterizes acyclic preference aggregation rules under various combinations of monotonicity, neutrality, decisiveness, and anonymity, in the spirit of Nakamura's (1979) Theorem on the core of simple games. Each of these characterizations can be seen to follow from Ferejohn and Fishburn's (1979) result on acyclic aggregation rules assuming only independence of irrelevant alternatives. We then state as corollaries to these characterizations extant results such as Sen's (1970) liberal paradox, Blau and Deb's (1977) theorem on the existence of vetoers, and Brown's (1975) theorem on the non-emptiness of the collegium.I thank David Austen-Smith, Michel Le Breton, Maurice Salles, and two anonymous referees for numerous enlightening conversations and comments. I also thank the National Science Foundation and Sloan Foundation for generous financial assistance. 相似文献
43.
Selection of the appropriate number and types of social indicators for use in mental health planning has been a perennial problem. Social indicators have been associated with several concepts (quality of life, community disorganization, populations at risk) of varying relevance for planning mental health services, and abstracting social indicators from these conceptual domains poses a variety of validity issues. The issues are discussed, and the viability of social indicators in mental health planning is reexamined. 相似文献
44.
May JC 《Journal of marital and family therapy》2005,31(3):221-237
Based on attachment theory and research, Family Attachment Narrative Therapy is introduced as a new family therapy modality developed to heal the experience of early childhood maltreatment. Unresolved childhood trauma has been correlated with impaired and delayed cognitive, behavioral and emotional functioning. Gentle, soothing, nonprovocative and nonintrusive narratives told by parents provide an alternative restorative experience designed to shift and change the child's destructive internal working model. The result is improved functioning and the ability to accept nurturing and care in relationships that offer love and safety. A representative case example is used to illustrate theory, practice and outcome. Pre- and posttherapy assessment supports the claim of improved functioning. 相似文献
45.
Using a longitudinal dataset which followed 2195 individuals employed in 3379 separate job placements over a four-year period, this paper explores movement between the employment supports, [Transitional (TE), Supported (SE), and Independent Employment (IE)], offered by clubhouses. Sixty-four percent of employed members held only one job (N=1395) and 36% held multiple jobs during the study (N=791). Patterns of movement were consistent for transitions between the first and second job and subsequent transitions. Forty-six percent of individuals holding multiple jobs moved from one employment type to another. When movement occurred clubhouse members were significantly more likely to move from employment types offering more supports to those that offer less supports. 相似文献
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47.
Parker J. Banks Matthew S. Tata Patrick J. Bennett Allison B. Sekuler Aaron J. Gruber 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2018,34(1):181-197
Gambling studies have described a “near-miss effect” wherein the experience of almost winning increases gambling persistence. The near-miss has been proposed to inflate the value of preceding actions through its perceptual similarity to wins. We demonstrate here, however, that it acts as a conditioned stimulus to positively or negatively influence valuation, dependent on reward expectation and cognitive engagement. When subjects are asked to choose between two simulated slot machines, near-misses increase valuation of machines with a low payout rate, whereas they decrease valuation of high payout machines. This contextual effect impairs decisions and persists regardless of manipulations to outcome feedback or financial incentive provided for good performance. It is consistent with proposals that near-misses cause frustration when wins are expected, and we propose that it increases choice stochasticity and overrides avoidance of low-valued options. Intriguingly, the near-miss effect disappears when subjects are required to explicitly value machines by placing bets, rather than choosing between them. We propose that this task increases cognitive engagement and recruits participation of brain regions involved in cognitive processing, causing inhibition of otherwise dominant systems of decision-making. Our results reveal that only implicit, rather than explicit strategies of decision-making are affected by near-misses, and that the brain can fluidly shift between these strategies according to task demands. 相似文献
48.
This paper attempts to examine the ideological frames of reference that inform the definitions of need that are used by disabled and non-disabled people. The main aim of the research upon which this paper is based being to test the degree of congruence of the non-disableds view of need with that of disabled people. Central to this is an exploration of the differences that exist in the perception of disability held by disabled people and nondisabled people. It investigates this through the use of a staged vignette based around a fictitious character (Mr Arthur Angus) and his family. The paper seeks to explore the multidimensional contexts in which individuals operate based upon a deconstruction of the medical/social locus of control model. 相似文献
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