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151.
Comment     
Bonferroni inequalities often provide tight upper and lower bounds for the probability of a union of events. The bounds are especially useful when this probability is difficult to compute exactly. There are situations, however, in which the Bonferroni approach gives very poor results. An example is given in which the upper and lower Bonferroni bounds are far from the probability they seek to approximate and successive bounds do not converge. Even an improved first upper Bonferroni bound may not be close to the probability of the union of events.  相似文献   
152.
Current policy places great emphasis on the development of "partnerships", particularly between NHS and local authority services, with the aims of increasing service coordination and delivery and improving health. To this end, primary care groups (PCGs), at the forefront of NHS organizational developments, are required to include a social services representative on their governing boards; similarly, primary care trusts (PCTs) have a social services representative on their executive committees. Drawing on a representative longitudinal national survey of English PCGs, the paper evaluates the contribution of these new governance arrangements to the development of inter-agency partnerships. Despite poor histories of collaboration and some major organizational barriers, there are some signs of progress, with social services representatives playing an active part in PCG affairs and having clear lines of communication about PCG matters with their employing authorities. Equally significantly, PCGs have also quickly established a wide range of contacts directly with other local authority services and departments. However, these early gains risk being limited by traditional professional inequalities between social work and medicine and, in particular, by the prospect of further organizational upheaval as PCGs merge with each other and/or acquire trust status.  相似文献   
153.
Julian Le Grand has argued that a key component of welfare reform involves changes in the assumptions about human behaviour which are embedded in social policies. Policy assumptions have been transformed from espousing a belief that social service providers act as well-intentioned knights and recipients as passive pawns, to a stance in which all participants are regarded as self-seeking knaves. These ideas are particularly pertinent to policy developments concerning financial obligations for children, and this paper examines these issues in relation to child support policy in New Zealand. It highlights the evident and inevitable failure of this policy to meet its primary stated aim of revenue generation. In New Zealand this failure is compounded by the creation of parallel systems for dealing with children and families, one for financial obligations and the other for care and development, which are founded on diametrically opposed assumptions about human behaviour and capabilities. This confusion is symptomatic of a wider failure in government policy towards families in New Zealand.  相似文献   
154.
A critical review of Bourdieu’s theory of the state is developed here against the backdrop of both his wider theoretical project and empirical studies. Elaborating the concepts of symbolic capital, symbolic violence, and symbolic domination, the centrality that Bourdieu accords to symbolic forms is compared to benchmark Weberian accounts that start with the state monopoly of violence. Reviewing also some of the burgeoning secondary literature discussing his theory of the state, Bourdieu’s writings, which encompass various antinomies, are shown to vacillate between two distinct perspectives—a strong and a weak theory of the state. His rejection of the “physicalist” approaches of Marx, Elias, and Tilly is elaborated and subject to a counter-critique, particularly in relation to the notion of symbolic “violence.” Bourdieu’s account of the state is shown to be as much a political as theoretical intervention. His antagonism towards Marxist accounts in particular is shown to be rooted in a pragmatic interest in the role of the “left hand of the state” in progressive reform; and this perspective is traced back to the twin influences of Durkheim and Hegel, French republicanism, and in particular the potential of the state to express a universal interest. At the same time, compared with sophisticated Marxist and Weberian accounts and the work of Norbert Elias and Gramsci, Bourdieu’s theory is shown to be severely lacking in the way that he deals with violence and coercion. His “expanded materialism,” particularly with the “strong theory,” bends the stick too far and overplays the symbolic basis of consent. Nevertheless, Bourdieu’s insights with regard to the pervasive influences of state practices of classification, taxonomy, delegation, and naming are shown to have real utility with regard to focused empirical investigations of the state in modern societies.  相似文献   
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157.
We describe an 18-month empirical investigation of three- and four-year-old children's uses of technology at home, based on a survey of 346 families and 24 case studies. The findings are reported in the context of social commentators' anxieties about the ways in which childhood is being transformed by technology. Although we report evidence of some parental disquiet about the role of technology in children's lives, we illustrate some of the complexities in families' attitudes to, and uses of, technology and conclude that it is not perceived by parents to be the threat to modern childhood that is claimed.  相似文献   
158.
Risk perception theories posit that changes in risk perception prompt subsequent changes in risk behavior. Prospective studies using observations made at three time‐points offer the capacity to test this hypothesis by observing sequential changes in both risk perceptions and behavior. A telephone survey was administered by random‐digit dialing to 255 adult Australian drivers at baseline (T1), 6 weeks (T2), and 14 weeks (T3). During weeks 2–5, a risk‐perception‐based anti‐speeding mass media campaign was conducted. The survey assessed risk perception, operationalized as the proportion of time that driving at 70 km/h (43 mph) was perceived to be dangerous, and self‐reported speeding behavior, defined as the frequency of respondents driving 5 km (3 mph) faster than the legal speed limit in built up areas. Higher T2 risk perception predicted lower T3 self‐reports of speeding after controlling T1 risk perception and T1 and T2 self‐reported speeding. This can be interpreted as changes in risk perceptions between T1 and T2 predicting changes in speeding between T2 and T3. Further analyses showed that increases in risk perception predicted lower subsequent self‐reported speeding changes, but decreases in risk perception were unrelated to those changes. Risk perception changes were unrelated to recall of exposure to the media campaign. These findings support a dynamic view of the relationship between risk perception and self‐reported behavior, and that risk perception theories can be applied to speeding.  相似文献   
159.
In this paper we set out what we consider to be a set of best practices for statisticians in the reporting of pharmaceutical industry‐sponsored clinical trials. We make eight recommendations covering: author responsibilities and recognition; publication timing; conflicts of interest; freedom to act; full author access to data; trial registration and independent review. These recommendations are made in the context of the prominent role played by statisticians in the design, conduct, analysis and reporting of pharmaceutical sponsored trials and the perception of the reporting of these trials in the wider community. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   
160.
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