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151.
We consider the fraction of pairs of m distinct alternatives on which a social welfare function f may be nondictatorially independent and Pareto when the domain of f satisfies the free k-tuple property. When k = 4 we improve the existing upper bound to . When there are at least 26 alternatives and we obtain an original upper bound, . To obtain these results we define and analyze the graph formed from the nondictatorial independent and Pareto pairs and
combine the results of this analysis with known results from extremal graph theory.
The authors extend special thanks to the two reviewers and the editor for their comments. 相似文献
152.
While it might make public relations professionals and faculty cringe, the term ‘government by public relations’ is a negative one, implying that governmental decision-making is guided by appearances rather than on the merits. This tag line is a relatively common American put-down of politicians and senior civil servants. This article examines the origins of the term, locating its usage in the WWII memoirs of Bruce Catton, then a government public information officer and later a renowned popular historian of the American Civil War. Catton's use of the term, his 1948 book War Lords of Washington, and his philosophy of government public information are examined in more detail to give context to the phrase ‘government by public relations.’ 相似文献
153.
George P. Knight Delfino Vargas‐Chanes Sandra H. Losoya Sonia Cota‐Robles Laurie Chassin Joanna M. Lee 《Journal of research on adolescence》2009,19(4):625-653
This study examines changes over time in ethnic affirmation/belonging and ethnic identity achievement, Spanish language use, English language use, Mexican/Mexican‐American affiliation/identification and Anglo affiliation/identification in a sample of Mexican‐American adolescents participating in a longitudinal study of juvenile offenders. The Multigroup Ethnic Identity Measure and the Acculturation Rating Scale for Mexican Americans‐II were completed by the Mexican‐American adolescents 7 times over a 3‐year period. The findings from longitudinal growth modeling analyses and growth mixture modeling analyses indicate that there is heterogeneity in the initial scores and changes over time on these variables that are related to markers for the cultural qualities of the home environment (i.e., generational status and mother's most frequent language use). In contrast to expectations, marginalized or assimilated acculturation trajectories/types were not overrepresented in this sample of adolescent offenders. Implications for our understanding of the nature of acculturation and enculturation processes and the way these processes are studied are discussed. 相似文献
154.
155.
Lee A. Smithey 《Sociology Compass》2009,3(4):658-671
Tactical choices and their execution are closely related to the construction of collective identities in social movements. Studying collective identity has helped scholars understand why people participate in collective action, but the array of tactics that constitute action has not been fully explored. An emerging interest in culture and strategy that situates social movement actors in a field of contention with opponents, allies, and bystanding publics raises questions about the tactics that are used and the construction of collective identity, which is formed in interaction with others. Strategies and tactics reflect collective identities but also provide opportunities for reaffirming or challenging them. Innovative methods can create tension as activists work to resolve what they do with who they feel they are. Conflict studies, nonviolent action studies, and sociological research using concepts such as framing, discourse, protest events, and tactical repertoires offer tools with which to bridge tactics and collective identity. 相似文献
156.
Few studies have examined the influence of environmental factors on children's executive functioning (EF) performance. The present study examined the effects of a punitive vs. non‐punitive school environment on West African children's EF skills. Tasks included a ‘cool’ (relatively non‐affective) and ‘hot’ (relatively affective/motivational) version of three EF tasks: delay of gratification; gift delay; and dimensional change card sort. Children had more difficulties with the hot versions of the tasks than the cool versions, and older children outperformed younger children. After controlling for verbal ability (Peabody picture vocabulary test‐third edition), a consistent pattern of interaction between school and grade level emerged. Overall, kindergarten children in the punitive school performed no differently than their counterparts in the non‐punitive school. However, in grade 1, children in the punitive school performed significantly worse than their counterparts in the non‐punitive school. These results point to the need to consider interactions among discipline style, age, and internalization processes of self‐regulation to better understand environmental influences on EF development. 相似文献
157.
Dal Ho Kim Woo Dong Lee Sang Gil Kang Yongku Kim 《Journal of the Korean Statistical Society》2018,47(4):520-536
For normal populations with unequal variances, we develop matching priors and reference priors for a linear combination of the means. Here, we find three second-order matching priors: a highest posterior density (HPD) matching prior, a cumulative distribution function (CDF) matching prior, and a likelihood ratio (LR) matching prior. Furthermore, we show that the reference priors are all first-order matching priors, but that they do not satisfy the second-order matching criterion that establishes the symmetry and the unimodality of the posterior under the developed priors. The results of a simulation indicate that the second-order matching prior outperforms the reference priors in terms of matching the target coverage probabilities, in a frequentist sense. Finally, we compare the Bayesian credible intervals based on the developed priors with the confidence intervals derived from real data. 相似文献
158.
Suzie S. Weng Justin S. Lee 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2016,27(2):509-524
Each year thousands of immigrants and refugees begin their lives in new places, speaking new languages, and facing new challenges. Challenges include access to health/mental care, education, transportation, and employment. Researchers and practitioners frequently focus on challenges of newcomers and their deficits in meeting needs for self-sufficiency. This study explores newcomers’ giving back and emphasizes an untapped reservoir of strength and capacity. Based on qualitative semi-structured interviews with 54 immigrants and refugees, themes identified include (1) a desire to maintain ethnic identity and connection; (2) ethnic community as an extension of family; (3) a sense of duty and obligation; and (4) measure of achieved success. Researchers and practitioners should shift their view to recognize the strengths and capacities of newcomers who give back to their communities. 相似文献
159.
This article examines the dilemmas faced by undocumented immigrants within the criminal justice system vis-à-vis the immigrant detention center and the resulting implications for social work. It explores the new realities for undocumented immigrants in the United States, including an explanation of state policies that have led to the criminalization of immigrants. The criminal justice and homeland security responses to undocumented immigrants, including the trend toward the privatization of immigration detention centers are analyzed. Finally, the implications of these trends for social work practice are discussed. 相似文献
160.
Multiracial Identity Integration: Perceptions of Conflict and Distance among Multiracial Individuals
This article examines how multiracial individuals negotiate their different and sometimes conflicting racial identities. Drawing from previous work on bicultural identity integration (see Benet-Martínez & Haritatos, 2005 ), we proposed a new construct, multiracial identity integration (MII), to measure individual differences in perceptions of compatibility between multiple racial identities. We found that MII is composed of two independent subscales: racial distance that describes whether different racial identities are perceived as disparate, and racial conflict that describes whether different racial identities are perceived as in conflict. We also found that recalling positive multiracial experiences increased MII, while recalling negative multiracial experiences decreased MII. These findings have implications for understanding the psychological well-being of multiracial individuals, and the development of social policy and programs catered to this population. 相似文献