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431.
432.
The authors consider a special case of inference in the presence of nuisance parameters. They show that when the orthogonalized score function is a function of a statistic S, no Fisher information for the interest parameter is lost by using the marginal distribution of S rather than the full distribution of the observations. Therefore, no information for the interest parameter is recovered by conditioning on an ancillary statistic, and information will be lost by conditioning on an approximate ancillary statistic. This is the case for regular multivariate exponential families when the interest parameter is a subvector of the expectation parameter and the statistic is the maximum likelihood estimate of the interest parameter. Several examples are considered, including the 2 × 2 table. 相似文献
433.
This paper explores the reasons why rural firms choose to adopt and use information and communications technologies. Evidence for rural restructuring and its implications for conceptualising the rural economy, is reviewed. Information on firms is obtained by means of a questionnaire survey and intensive in-depth interviews. Pronounced variations in adoption are identified. They are explained by the pressures exerted by customers and suppliers and the ways these are responded to by managers. The concept of a two-tier rural economy, based upon levels of adoption, is introduced. The need to focus upon global–local rather than urban–rural differences is emphasised. Implications for those who advise and seek to help rural businesses are considered. 相似文献
434.
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
435.
The Internet poses challenges to parents who want their children to take advantage of online resources but also want to protect their children from questionable content. Using data from 749 dyads of American parents and their teenage children with Internet access, this study finds that the majority of parents report regulating their teenage children's Internet use, but parents report more monitoring (61%) than teens report (38%). Multivariate regression analyses indicate fathers, younger parents, parents who use the Internet with their children, and parents with younger teens engage in a higher level of parental monitoring. This study provides a first look at parental monitoring of children's Internet use and points to the need to study family rules from both parents’ and children's perspectives. 相似文献
436.
We examined the occupational mobility and earnings attainment of young black and white male workers in the period 1974–1981 for evidence of class polarization among blacks in the era following the 1960s' antidiscrimination legislation. Our model links occupational status and earnings to the social resources of education and father's socioeconomic status, using data from the Panel Study of Income Dynamics, 1968–1981. The results suggest that such resources operated more strongly for advantaged blacks than for whites. But for less advantaged blacks, race remained a significant barrier. As predicted by the polarization hypothesis, enforcement of affirmative action guidelines was beneficial, but only to more qualified blacks.An earlier version of this paper was presented at the annual meetings of the Society for the Study of Social Problems, August 1987. 相似文献
437.
438.
James C. Coyne Suzanne Fechner-Bates 《Australian and New Zealand Journal of Family Therapy》1992,13(4):203-208
The potential contribution of family therapists to the treatment of depression remains underdeveloped. Family therapists need to articulate how changes in family functioning might benefit depressed persons, as well as how other problems in the families of depressed persons tend to go unrecognised. Furthermore, family therapists need to be alert to how undetected depression in adults and children may interfere with their ability to meet their goals with families who seek therapy for other persons. This article provides family therapists with (1) an overview of the nature and experience of depression; (2) an introduction to antidepressant medication; (3) a summary of research findings relating depression to its family context and (4) a brief overview of developments in the marital and family treatment of depression. 相似文献
439.
Using Bowen Family Systems Theory as a theoretical underpinning, in this study, we investigated the hypothesis that clients with higher levels of differentiation would improve more quickly in therapy than clients with lower levels of differentiation. Hierarchical Linear Modeling was used to analyze the data over nine sessions of therapy in a sample from an on-campus training clinic. The results suggest that there was variation in the initial levels of psychological symptoms and that differentiation was a significant predictor of this variance. The results also suggest that although psychological symptoms decreased over the nine sessions of therapy, there was very little variance in this change. These results are discussed in relation to Bowen Theory. The difficulties of doing this type of research and the lessons learned from this project are also discussed. 相似文献
440.
Gender differences among a cohort of injured patients seeking emergency medical services were examined with respect to their experiences as perpetrators and/or victims of domestic violence. Contextual issues, including violence initiation, emotional and behavioral responses to partner-initiated violence, and injury frequency and severity were analyzed. Women reported male partner-initiated violence more frequently than men reported female partner-initiated violence. Behavioral responses to partner initiated violence varied. Women were more likely to report using force back and to involve law enforcement. Women were more likely to be injured in a domestic assault over their lifetime, within the last year, and at the time of recruitment. Comparison of injury severity revealed that women reported higher rates of injuries than men in all possible severity categories. Women also reported experiencing more fear than men during partner-initiated violence, as well as being subjected to larger numbers of dominating and controlling behaviors, and greater intimidation secondary to their partner's size. Understanding contextual differences in partner violence for women and men has significant implications for policy development, identification, treatment, and referral of patients identified as living in violent relationships. 相似文献