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We prove a Berry–Esséen bound for general M-estimators under optimal regularity conditions on the score function and the underlying distribution. As an application we obtain Berry–Esséen bounds for the sample median, the Lp -median, p > 1 and Huber's estimator of location 相似文献
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Objectives. Although urban scholarship has come to better understand the dynamics of black political incorporation in the United States, to date scant empirical attention has been paid to an important element of minority representation in local politics—the rise of black mayors. The present study addresses this gap in the extant literature. Methods. We analyze incidences of black mayoralties by fitting standard pooled and random effects probit models to a panel of 309 cities observed between 1971 and 2000. Results. Although cities' racial profiles are strongly associated with the incidence of black mayoralties, black representation on city council, black educational attainment, and reformed governments increase the odds of black mayoral emergence. On the other hand, southern location continues to depress the rise of black mayoralties, as do partisan elections, particularly in cities where no racial group constitutes a majority. Conclusions. Although our results partially confirm extant research on the diffusion of black mayoralties in American urban politics, they also call into question conventional wisdom. Our study emphasizes the need for more large‐N studies of minority representation in urban politics and provides suggestions for how the independent effects of black mayors on municipal policy outcomes might subsequently be analyzed empirically. 相似文献
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This experiment examined the impact of source, modality, and participation on perceptions of credibility, salience, attitudes, and general Web site evaluation. The data showed no significant differences between online stories coming from either public relations or news sources on any of the study's dependent variables. However, significant differences did emerge for the effects of multimedia and audience engagement. 相似文献
508.
Douglas V. Porpora 《Sociological Forum》1996,11(2):209-229
With the increased sociological interest in popular culture, many studies have examined the hero types lauded by the media
from situation comedies to movies, books, and magazines. Few studies, however, have examined who, if anybody, actual individuals
identify as personal heroes. To the extent that the hero identification of individuals has been examined at all, it has generally
been the hero identification of children and adolescents that has been studied. The study of heroes is important because heroes
are one indicator of who we are and what we stand for. That is partly what motivates the recent attention to the media's identification
of heroes. Yet while the media represent a very visible aspect of culture, who individuals privately cite as their heroes
is, although less visible, just as much a part of who we are as a culture. Accordingly, this paper reports on findings from
two telephone surveys conducted in Philadelphia that, among other questions pertaining to the meaning of life, asked adults
over 18 whether they had any heroes and if so who those heroes were. The tendency to identify with heroes was found to be
related to transcendental concerns with the meaning of life and to religiosity. Overall, the pattern of findings discloses
an unstudied dimension of cultural disenchantment. 相似文献
509.
As U.S. cities accommodate increasing ethnic and racial diversity, political choices may unify or divide their local populations. Those choices pull communities toward two different modes of pluralism: traditional “melting pot” assimilation or a complex mosaic of racial and ethnic assertiveness. Central to this issue is equity and empowerment, which may be accentuated by minority populations’ size, structure, and spatial concentration. We examine two potential modes of local empowerment: “dominance,” whereby each group is the majority of voters in single election districts (reinforcing separative tendencies), and “influence,” whereby a group gains “influential minority” status in several districts (reinforcing unifying tendencies). 相似文献
510.
Robin Banerjee Carolien Rieffe Mark Meerum Terwogt Ana Maria Gerlein Maria Voutsina 《Social Development》2006,15(3):418-433
Two studies compared popular and rejected children's reasoning regarding social interactions involving negative emotions. The first study, with 23 rejected and 23 popular 10‐ to 11‐year‐olds, involved hypothetical social scenarios where a classmate ‘victim’ was likely to experience a negative emotion. Although popular and rejected children both recognized negative emotions and were equally likely to suggest helping behaviour to aid the victim, there were gender effects on the type of helping behaviour suggested. Specifically, popular girls were significantly more likely to offer comforting behaviour than advice whereas popular boys offered advice more than comfort; no such preferences were exhibited by the rejected children. Furthermore, popular girls were significantly more likely than other children to refer to emotional states when justifying their helping response. In the second study, 30 popular and 30 rejected eight‐ to 10‐year‐olds identified the motives behind story characters' efforts to mask negative emotions. Popular girls were more likely to identify the target motives than rejected girls, but no such difference was apparent for the boys. The results are discussed in the light of evidence regarding gender differences in peer interaction patterns. 相似文献