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91.
Jury theorems with multiple alternatives 总被引:1,自引:1,他引:0
Patrick Hummel 《Social Choice and Welfare》2010,34(1):65-103
I consider a game in which imperfectly informed jurors vote to select one of several possible choices when there is a natural
ordering of the possibilities. Each juror votes for the largest alternative the juror would like to implement, and the alternative
that is selected is the largest alternative supported by a given number of jurors. For non-unanimous voting rules, the probability
of a mistaken judgment goes to zero as the number of jurors goes to infinity. I also give necessary and sufficient conditions
to obtain asymptotic efficiency under unanimous voting rules, and show that unanimous rules may lead to a bias in which moderate
outcomes are never chosen. 相似文献
92.
David L. Tschirley Colin Poulton Nicholas Gergely Patrick Labaste John Baffes Duncan Boughton Grald Estur 《Development policy review : the journal of the Overseas Development Institute》2010,28(3):295-323
This article analyses the performance of cotton sectors across East, Southern, and West Africa, paying particular attention to the wide diversity of institutional arrangements that they now exhibit. It finds strong support for earlier contentions regarding trade‐offs between competition and coordination, and between the roles of public and private sectors. New insights provide concrete and context‐specific guidance to policy‐makers and stakeholders regarding the key challenges they will face and the risks they will need to manage as they work to improve productivity and ensure an equitable division of benefits within cotton sectors. 相似文献
93.
94.
Patrick Heuveline Hongxing Yang Jeffrey M. Timberlake 《Journal of marriage and the family》2010,72(5):1362-1376
Research in the United States has shown that children growing up in 2‐parent households do better in school than children from single‐parent households. We used the Trends in International Mathematics and Science Study (TIMSS) data to test whether this finding applied to other countries as well (N = 100,307). We found that it did, but that the educational gap was greater in the United States than in the other 13 countries considered. Results from 2‐level hierarchical linear models demonstrated that international differences in the educational gap were associated with several indicators of national policy and demographic contexts. No single policy appeared to have a large effect, but several policy combinations were associated with substantially reduced educational gaps between children from different family structures. 相似文献
95.
John Patrick Roche 《Sociological spectrum》2013,33(2-3):169-186
This paper presents a critical review of the most frequently cited resurgence of ethnicity studies. Many of the sources cited in recently published ethnic relations books are found to lack an empirical base. They are essentially polemical, impressionistic and anecdotal works. Empirical studies that support the resurgence of ethnicity theme are also examined. Their shortcomings are noted. Nevertheless, these empirical studies provide convincing evidence that ethnic differences persist into the later generations. Overall, however, the empirical studies overwhelmingly document increasing assimilation. Virtually no evidence is found for the notion of a third generation resurgence. 相似文献
96.
97.
Richard G. Rogers Rebecca Rosenblatt Robert A. Hummer & Patrick M. Krueger 《Social science quarterly》2001,82(3):435-452
Objective . This article examines individual level black-white differences in adult homicide mortality. Homicide is a major social problem and a central cause of preventable death in the United States. A homicide not only claims one life prematurely but can also devastate a family, friends, and a neighboring community. Methods . We link eight consecutive years of the National Health Interview Survey (1987–94) to the Multiple Cause of Death file through the National Death Index (1987–97), and use Cox proportional hazard models to examine the role of social factors in black-white homicide mortality in the United States. Results . We find that individual level sociodemographic characteristics—age, sex, marital status, education, employment status, and geographic factors—explain almost 35 percent of the racial differences in homicide mortality. Conclusions . These results demonstrate the contributions that National Center for Health Statistics data can make to criminological literature and reveal the mechanisms through which blacks experience higher homicide mortality than whites. Such illumination may lead to a reduction in the fourth leading preventable cause of death in the United States. 相似文献
98.
N. Patrick Peritore 《The American Sociologist》1990,21(4):359-372
Latin American fieldwork may involve danger for researcher and subject alike. The researcher must work to minimize his or
her own or others’ exposure to violence. Unobtrusive methods such as Q-Methodology, participant observation, and quiet interviewing
are recommended so that the researcher can build a sustaining and protecting network of contacts. This article discusses the
interpersonal relations, problems of security, and field entry techniques involved in sensitive research situations.
Ana Karina Galve de Peritore, his wife and frequent field collaborator, is a former professor of international relations at
National Autonomous University of Mexico, and is currently a doctoral candidate in rural sociology at University of Missouri-Columbia. 相似文献
99.
Abstract Previous studies have shown that African Americans have less favorable impressions about wildlands and recreate on wildland areas less frequently than do whites. However, most of these investigations have been conducted on non-rural populations. Rural perceptions of wildlands and visitation to such areas have received relatively little attention. In this exploratory study, we propose that race operates on wildland recreation visitation through the different meanings rural blacks and whites attribute to wildlands. We examine this hypothesis with a structural model which specifies wildland meaning as an intervening factor between race and visitation. Single equation results show blacks visit wildlands less, and have less favorable definitions of wildlands, compared to whites. However, when wildland meaning is included in the structural model, racial differences become insignificant. This suggests that the meanings different racial groups attach to wildlands help explain visitation. Both sex and age are also significant predictors of both wildland meaning and visitation. 相似文献
100.
Social security benefits provide an essential resource for most families on low incomes. This paper examines the life cycle of claiming activities, from the initial decision to claim through to routine claiming. New empirical evidence is drawn from a study of relatively low income households in South East England carried out by the Alvey DHSS Demonstrator Project. A number of analytical stages which comprise the “claiming process” are identified for the purpose of describing the complex sequence of events associated with claiming behaviour. The paper shows how adequate explanations of the life cycle of claiming activities need to be located within a broader analysis of decision-making within relatively low income households. 相似文献