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81.
The Media and Genetically Modified Foods: Evidence in Support of Social Amplification of Risk 总被引:4,自引:0,他引:4
Empirical examinations of the "social amplification of risk" framework are rare, partly because of the difficulties in predicting when conditions likely to result in amplification effects will occur. This means that it is difficult to examine changes in risk perception that are contemporaneous with increases and/or decreases in social or media discussion of the risks associated with a particular risk event. However, the collection of attitude data before, during, and after the increased reporting of the risks of genetically modified food in the United Kingdom (spring 1999) has demonstrated that people's risk perceptions do increase and decrease in line with what might be expected upon examination of the amplification and attenuation mechanisms integral to the framework. Perceptions of benefit, however, appeared to be permanently depressed by negative reporting about genetically modified food. Trust in regulatory institutions with responsibility for protecting the public was not affected. It was concluded that the social amplification of risk framework is a useful framework for beginning to explain the potential impact on risk perceptions of a risk event, particularly if that risk event is presented to the public as a new hazard occurring in a crisis context. 相似文献
82.
This paper presents new identification results for models of first–price, second–price, ascending (English), and descending (Dutch) auctions. We consider a general specification of the latent demand and information structure, nesting both private values and common values models, and allowing correlated types as well as ex ante asymmetry. We address identification of a series of nested models and derive testable restrictions enabling discrimination between models on the basis of observed data. The simplest model—symmetric independent private values—is nonparametrically identified even if only the transaction price from each auction is observed. For richer models, identification and testable restrictions may be obtained when additional information of one or more of the following types is available: (i) the identity of the winning bidder or other bidders; (ii) one or more bids in addition to the transaction price; (iii) exogenous variation in the number of bidders; (iv) bidder–specific covariates. While many private values (PV) models are nonparametrically identified and testable with commonly available data, identification of common values (CV) models requires stringent assumptions. Nonetheless, the PV model can be tested against the CV alternative, even when neither model is identified. 相似文献
83.
LaKind Judy S. Ginevan Michael E. Naiman Daniel Q. James Anthony C. Jenkins Roger A. Dourson Michael L. Felter Susan P. Graves Carol G. Tardiff Robert G. 《Risk analysis》1999,19(3):375-390
The ultimate goal of the research reported in this series of three articles is to derive distributions of doses of selected environmental tobacco smoke (ETS)-related chemicals for nonsmoking workers. This analysis uses data from the 16-City Study collected with personal monitors over the course of one workday in workplaces where smoking occurred. In this article, we describe distributions of ETS chemical concentrations and the characteristics of those distributions (e.g., whether the distribution was log normal for a given constituent) for the workplace exposure. Next, we present population parameters relevant for estimating dose distributions and the methods used for estimating those dose distributions. Finally, we derive distributions of doses of selected ETS-related constituents obtained in the workplace for people in smoking work environments. Estimating dose distributions provided information beyond the usual point estimate of dose and showed that the preponderance of individuals exposed to ETS in the workplace were exposed at the low end of the dose distribution curve. The results of this analysis include estimations of hourly maxima and time-weighted average (TWA) doses of nicotine from workplace exposures to ETS (extrapolated from 1 day to 1 week) and doses derived from modeled lung burdens of ultraviolet-absorbing particulate matter (UVPM) and solanesol resulting from workplace exposures to ETS (extrapolated from 1 day to 1 year). 相似文献
84.
Ward V House A Hamer S 《Evidence & Policy: A Journal of Research, Debate and Practice》2009,5(3):267-279
Transferring health care research into policy and practice is a messy and complex process which both policymakers and researchers can struggle with. A potential solution is to use individuals or organisations as knowledge brokers. Using a range of literature, this paper explains the theory behind knowledge brokering, identifies three models of brokering and explores the challenges of brokering. We suggest that clarifying these factors is a significant step towards planning well designed and rigorously evaluated brokering interventions. We also suggest that a clearly defined theoretical framework could help us to find out more about how brokering works and its effectiveness. 相似文献
85.
We use a sample of CEO appointments at US corporations over the years 1992–2004 to test the 'glass cliff' hypothesis, which posits that females are appointed to leadership positions at firms that are in a precarious financial condition. Our analysis utilizes three measures of stock-price-based financial performance and two distinct control samples of appointments of males to the CEO position. We find that corporate performance preceding CEO appointments tends to favor females, implying that females (males) are appointed to the CEO position largely at times when the firm is in relatively better (worse) financial health. Disaggregating the data by appointments in up versus down markets, at high-risk versus low-risk firms, and by calendar time yield similar conclusions. There appears to be no glass cliff facing female CEOs at US firms. Our findings suggest a need for additional research to identify where and for what types of positions this phenomenon is prevalent. 相似文献
86.
Fisher S 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2000,16(1):25-51
This study is the first attempt to measure the prevalence of problem gambling attributable to a specific sector of the gambling industry. One thousand, one hundred and five casino patrons in 40 casinos in the UK were interviewed, face-to-face. Respondents were screened for problem gambling using a multiple response version of DSM-IV (DSM-IV-MR). The study found support for Eadington's (1988) hypothesis, that UK casinos could be largely sustained by regular players, among whom the prevalence of problem gambling is high. The study also found support for the hypothesis that, to the extent different gambling sectors are patronised by demographically different client groups, so the problem gamblers associated with them will reflect these client groups. The problem gamblers among the regular casino patrons were demographically distinct from the problem gamblers in the sample who showed a preference for other gambling forms. Other key findings support those found in other jurisdictions. Sector-specific prevalence studies may be the next step forward in epidemiological research on problem gambling. They have the major advantage of netting significantly more problem gamblers from much smaller samples than similar studies in the general population. They also have the potential to reveal the proportion of problem gamblers attributable to each sector, along with their demographic characteristics. Such information would result in more specific information being available for regulators seeking to minimise the social impact of problem gambling and those involved in the development of prevention and treatment strategies. 相似文献
87.
Burwash SC 《Work (Reading, Mass.)》1999,12(2):133-137
Given the global changes in how work is conceptualized, organized and performed [8], it is critical that graduating occupational therapists have an up-to-date knowledge of work and work practice. This article briefly explores the relative dearth of work practice courses in current occupational therapy curricula and presents the rationale for developing a model for teaching and learning about occupational therapy work practice. It introduces a client-centered and occupation-focused model developed for an undergraduate work practice course and describes the use of the model in a specific course. The model identifies eight common work-related areas of concern - values clarification, vocational exploration, vocational choice, job search, starting work, maintaining work, returning to work and leaving work. Occupational Therapy tools, techniques and programs which may be useful in addressing these concerns; and the environmental factors that influence therapist and client in addressing work issues are also part of the model. The article concludes with examples of topics and issues which could be explored using this teaching and learning model. 相似文献
88.
Eberhard S 《Work (Reading, Mass.)》1999,13(1):21-30
Recent welfare reforms in the United States shifted the emphasis from income maintenance to preparation for employment. Many families receiving welfare benefits have members with disabilities, which can complicate the process of transition into the workforce. Rehabilitation professionals have a unique set of skills, expertise and experiences which could enhance work transition outcomes for welfare recipients. This purpose of this article is to (a) familiarize rehabilitation professionals with welfare reform changes in the United States, (b) summarize the experiences of families affected by those changes who participated in a recent study, and (c) present a service delivery model to enhance parental power and flexibility based on rehabilitation principles. 相似文献
89.
Susan Long 《Human Relations》1999,52(6):723-743
This paper argues that an organizationaldiscourse on consumerism is replacing a prior discourseof dependency. This discourse encourages, and isencouraged by, economic rationales for behavior and ismarked by the collapse of many complex societal rolesinto the simpler category of customer.Moreover, practices emergent from consumerism andeconomic rationalism often act as organizational andsocial defences against anxieties about theuncertainties and changes occurring in a worldincreasingly dominated by global markets where thecustomer is sovereign. Six workinghypotheses are proposed to explain the operation of these new socialdefences. Evidence in support of these hypotheses comesfrom collaborative action research projects in which theauthor is involved. The argument moves toward a consideration of the new consumerprovider pair which, it is proposed, has becomea major signifier within the consumer discourse andwhich might be considered as a transitional pair indealing with widespread organizationalchange. 相似文献
90.
One of Super's most important contributions has been in explicating those developmental tasks that involve planning, exploring, and deciding, processes known collectively as readiness for career choices. The authors review existing means of conceptualizing and operationalizing the various aspects of readiness, as well as innovative practice applications that have emerged from this work. Next, selected elaborations and extensions of the readiness construct are described. Finally, future directions for theory and research on readiness are presented with a particular emphasis on the promise of considering contextual issues, motivational factors, and an expanded measurement perspective in subsequent inquiry and practice. 相似文献