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111.
Neil S. Barnett Ian S. Gomm Len Armour 《Australian & New Zealand Journal of Statistics》1995,37(2):145-152
The paper makes an appraisal of the most appropriate sampling point for situations where a single sample must be used to estimate the mean flow of a continuous stream during a set time interval. Taking ‘optimal’ to mean the point at which the estimation error variance is minimised, optimal sampling locations are obtained for constant, linear and exponential flow rates when the process variogram is assumed linear or exponential. Numerical results illustrate the significance of failing to sample at the optimal point. 相似文献
112.
An interesting feature of successive inter-event times in a Poisson renewal process, when observed through a superimposed (possibly random) grid, can be interpreted as an extended form of the ‘inspection paradox’. Probabilistic measures are determined and an estimation and testing procedure is outlined which could be used to examine possible departure from randomness (Poisson form). The problem arose from study of security systems and the results have important applications in that field. 相似文献
113.
Barnett AE 《Physician executive》1993,19(6):27-29
There is probably no geographic area in the United States in which the health care environment is more turbulent than that of Southern California. Long before President Clinton's proposals began serious national debate on health care reform, a massive provider-driven realignment of the system was occurring in that region of the country. Multispecialty medical groups have generally led the way and have acquired ever larger managed care populations through merger and acquisition of other groups and practices. Hospitals, hampered by large fixed capital bases, have struggled to reinvent themselves as cost-effective and primary care-friendly environments in order to be attractive to managed care physicians. Almost ignored in this reconfiguration has been the university teaching hospital. This article discusses one attempt to reconcile contractually an integrated, capitated, and managed care-oriented health care system with an academic medical center in a strategic alliance. 相似文献
114.
Government and policymakers want to engage the public in a dialogue about the conduct and consequences of science and increasingly seek to actively involve citizens in decision-making processes. Implicit in this thinking is that greater transparency and public inclusion will help dispel fears associated with new scientific advancements, foster greater public trust in those accountable, and ultimately increase the acceptability of new technologies. Less understood, however, are public perceptions about such high-level involvement in science and how these map onto public trust and attitudes within a diverse population. This article uses the concept of public efficacy -- the extent to which people believe that the public might be able to affect the course of decision making -- to explore differences in trust, attentiveness, and attitudes toward modern genetic science. Using nationally representative data from the 2003 British Social Attitudes Survey, we begin by examining the characteristics of those who have a positive belief about public involvement in this area of scientific inquiry. We then focus on how this belief maps on to indicators of public trust in key stakeholder groups, including the government and genetic scientists. Finally, we consider the relationship between public efficacy and trust and attitudes toward different applications of genetic technology. Our findings run contrary to assumptions that public involvement in science will foster greater trust and lead to a climate of greater acceptance for genetic technology. A belief in public efficacy does not uniformly equate with more trusting attitudes toward stakeholders but is associated with less trust in government rules. Whereas trust is positively correlated with more permissive attitudes about technologies such as cloning and gene therapy, people who believe in high-level public involvement are less likely to think that these technologies should be allowed than those who do not. 相似文献
115.
Stein LA Colby SM O'Leary TA Monti PM Rohsenow DJ Spirito A Riggs S Barnett NP 《Journal of drug education》2002,32(4):271-286
A wide range of data are obtained with self-report. Information obtained from persons using substances is generally reliable and valid, however, many studies show that some proportion of self-reports regarding substance use are inaccurate. This study examines self-reported response distortion in adolescents who received a brief intervention to reduce their smoking. Findings indicate that age and ethnicity of respondent may influence reported response distortion. Factors that appear to influence under- and over-reporting include social desirability and fear of repercussion. Response distortion does not appear to affect rated usefulness of the intervention, nor does intervention type appear to influence whether respondents thought the researcher wanted them to report less use. Results point to the need for further research regarding adolescents and response distortion. 相似文献
116.
Risk Perception and Experience: Hazard Personality Profiles and Individual Differences 总被引:1,自引:0,他引:1
The dominance of the "psychometric" paradigm and the consequent emphasis on personality profiles of hazards has resulted in little attention being given to individual variability in risk judgments. This study examines how far differences in experience of risk activities can explain individual variability in risk assessments. A questionnaire study (n = 172) was used to explore the relationships between experience and risk perceptions in relation to 16 risk activities. It was expected that these relationships would differ for voluntary and involuntary activities. Measures of experience included assessments of "impact" and "outcome" valence as well as "frequency." These three aspects of experience each related to risk assessment but their relationship depended on whether the risk experiences were voluntary or not. The results indicate the importance of developing more fine-grained ways of indexing risk experience. 相似文献
117.
The Social Costs of Gambling: An Economic Perspective 总被引:3,自引:1,他引:2
Walker DM Barnett AH 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》1999,15(3):181-212
Much of the opposition to legalized gambling is based on analyses of the social costs that occur as a result of pathological gambling. It is our contention that many, if not most, authors who have contributed to this literature are either unclear or misguided in what they define as social costs. Instead of starting with a clear definition of what constitutes a social cost, these authors have adopted an ad hoc approach-using "common sense" to determine what constitutes losses to society and then attempting to quantify the impact of those activities. We believe this is not, as some suggest, simply a matter of semantics. Rather, it is a serious problem in the gambling literature. How do we differentiate between a consequence of pathological gambling that is a "social cost" and one that is not? Which of the consequences of addictive behaviors that are associated with gambling arise when gambling is legal, and which will be manifest in some form whether or not gambling is legal? In this article we explain the economic perspective on social costs. An understanding of this paradigm removes the subjectivity in the classification of pathological gambling's social costs. The paper has three major components. First, we introduce the economic notion of social costs. Using this paradigm, we differentiate between the "true" social costs related to pathological gambling, and other negative consequences that cannot legitimately be classified as social costs. Second, we evaluate a recent social cost study using the economics social cost paradigm. Third, we discuss two types of social costs that have been largely overlooked in the gambling literature. One is caused by gambling prohibition. The other occurs as a result of "rent seeking" that is related to the political process surrounding the legalization of gambling. 相似文献
118.