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排序方式: 共有1164条查询结果,搜索用时 15 毫秒
21.
Tammy O Tengs Sajjad Ahmad Rebecca Moore Eric Gage 《Journal of policy analysis and management》2004,23(4):857-872
If manufacturing a safer cigarette is technically possible--an open question--then mandating that tobacco manufacturers improve the safety of cigarettes would likely have both positive and negative implications for the nation's health. On the one hand, removing toxins may reduce the incidence of smoking-related diseases and premature mortality in smokers. On the other hand, smokers might be less inclined to quit, those who have quit might resume the habit, and youth who have never smoked will have one less reason to avoid tobacco use. To assess the expected population health impacts of a legislative or regulatory mandate, we created the Tobacco Policy Model, a system dynamics computer simulation model. The model relies on secondary data and simulates the U.S. population over time spans as long as 50 years. Our simulation results reveal that even if requiring cigarettes to be safer makes smoking more attractive and increases tobacco use, a net gain in population health is still possible. 相似文献
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From hegemonic to inclusive masculinities in English professional football: marking a cultural shift
AbstractIn this article, we conduct a generational study of measuring progress towards the inclusion of homosexuality in professional sport. We accomplish this by interviewing an openly gay football player, Anton Hysén, in the year 2017, using the precise same questions about the relationship between his homosexuality and sport that were asked of the first openly gay professional footballer in 1992, Justin Fashanu. We thus measure difference in attitude according to the 25 years that have elapsed between the interviews. Our results emphasize two themes: First, the near-total acceptance of being gay within professional football today, compared to 25 years ago; and second, the social praise that is levied upon today’s openly gay sportsmen, compared to the social stigma placed upon Fashanu. 相似文献
25.
Jean‐Paul Deléage: Histoire de l'écologie — Une science de l'homme et de la natura. La Découverte, Paris, 1991. 相似文献
26.
Eric N. Lindblom 《Housing Policy Debate》2013,23(3):957-1025
Abstract Because of the misery and deprivation suffered by homeless persons, the initial response to homelessness in the United States focused first on quickly addressing the dire need for emergency food and shelter, and then on providing additional assistance to already homeless persons—ideally to help them move out of homelessness. New preventive measures to help people avoid becoming homeless were largely ignored or put off.1 But now that efforts to provide emergency food and shelter are well under way throughout the country, many more experts, policymakers, and service organizations have begun focusing on homelessness prevention.2 Nevertheless, actual prevention efforts are still tentative and somewhat haphazard. In support of a more rapid expansion of effective homelessness‐prevention activities, this paper discusses the benefits of prevention, develops an initial framework for a comprehensive homelessness‐prevention strategy, and, using this framework, evaluates existing prevention efforts and suggests new initiatives. 相似文献
27.
This article addresses a problem faced by many historians of living standards: what was the effect of unemployment on the real incomes of working-class families during industrialization? The 1901 Census of Canada offers a rare opportunity to answer this question, and to measure both unemployment and living standards while taking into account the contributions of all family wage-earners. The conclusion is that average weekly or monthly wages were more important than work duration in determining the living standards of poor families. 相似文献
28.
Darrell O. Ricke Ph.D. Philip Fremont‐Smith M.S. James Watkins B.S. Sara Stankiewicz M.S. Tara Boettcher B.S. Eric Schwoebel Ph.D. 《Journal of forensic sciences》2019,64(5):1468-1474
High‐throughput sequencing (HTS) of large panels of single nucleotide polymorphisms (SNPs) provides an alternative or complimentary approach to short tandem repeats (STRs) panels for the analysis of complex DNA mixture forensic samples. For STRs, methods to estimate individual contribution concentrations compare capillary electrophoresis peak heights, peak areas, or HTS allele read counts within a mixture. This article introduces three approaches (mean, median, and slope methods) for estimating individual DNA contributions to forensic mixtures for HTS/massively parallel sequencing (MPS) SNP panels. For SNPs, the major:minor allele ratios or counts, unique to each contributor, were compared to estimate contributor proportion within the mixture using the mean, median, and slope intercept for these alleles. The estimates for these three methods were typically within 5% of planned experimental contributions for defined mixtures. 相似文献
29.
Social Justice Research - Acting on one’s moral principles is not always easy. Upholding one’s moral beliefs may run counter to one’s social environment or situational demands. It... 相似文献
30.
Visas and work permits: Possible global negotiating initiatives 总被引:1,自引:0,他引:1
We discuss global options for initiatives intended to ameliorate adverse impacts of visa and work permit systems used by national
governments around the world. We first describe and document some of their effects, noting the relative lack of other research
work on these issues. We then discuss proposals for a new and supplemental global visa structure which have been made as part
of the Mode 4 GATS negotiations in the WTO, suggesting that the GATS/WTO may be an imperfect institutional location for negotiating
on these matters. We then evaluate other approaches, including what realistically could be possible if a new body specifically
created for global negotiation in the area were to be used.
相似文献
John WhalleyEmail: |