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121.
This paper reports the results of three studies designed to test the nomological validity of a consumer well-being (CWB) measure
in relation to personal transportation. The CWB measure was developed guided by the theoretical notion that the CWB in relation
to personal transportation vehicles is significantly enhanced when the consumption of the vehicle meets the full spectrum
of human developmental needs (i.e., safety, economic, family, social, esteem, actualization, knowledge, and aesthetics needs).
The nomological validity of the CWB measure was tested by exploring the various antecedents and consequences of the construct.
This was done in three separate studies in which the results of one study prompted further conceptual development and additional
testing. The overall findings of the three studies provided support for the nomological validity of the CWB measure. 相似文献
122.
Incomplete covariate data is a common occurrence in many studies in which the outcome is survival time. With generalized linear models, when the missing covariates are categorical, a useful technique for obtaining parameter estimates is the EM by the method of weights proposed in Ibrahim (1990). In this article, we extend the EM by the method of weights to survival outcomes whose distributions may not fall in the class of generalized linear models. This method requires the estimation of the parameters of the distribution of the covariates. We present a clinical trials example with five covariates, four of which have some missing values. 相似文献
123.
Dr. Joseph M. Chandy Ph.D. Dr. Robert W. Blum M.D. Ph.D. M.P.H. Dr. Michael D. Resnick Ph.D. 《Child and Adolescent Social Work Journal》1996,13(5):411-432
This study examined the school performance, suicidal involvement, disordered eating behaviors, pregnancy risk and chemical use of teenagers with a history of sexual abuse or parental alcohol misuse and found that they had higher rates of these adverse outcomes than among a comparison group of teenagers without such background risk factors. Adolescents with dual-risk background reported higher levels of suicide risk, disordered eating, sexual behaviors and chemical abuse than teenagers with only one background risk factor. Among index group members, protective factors against these adverse outcomes included a high degree of religiosity and the ability to discuss problems with family or friends. Risk factors that increased the likelihood of adverse outcomes included depression, perceived substance use in school and worries about family financial security.The first author was supported in the preparation of this article by a grant from the Lois and Samuel Silberman Fund of New York. 相似文献
124.
Joseph P. Romano 《Revue canadienne de statistique》1989,17(1):75-80
An important statistical problem is to construct a confidence set for some functional T(P) of some unknown probability distribution P. Typically, this involves approximating the sampling distribution Jn(P) of some pivot based on a sample of size n from P. A bootstrap procedure is to estimate Jn(P) by Jn(&Pcirc;n), where P?n is the empirical measure based on a sample of size n from P. Typically, one has that Jn(P) and Jn(P?n) are close in an appropriate sense. Two questions are addressed in this note. Are Jn(P) and Jn(P?n) uniformly close as P varies as well? If so, do confidence statements about T(P) possess a corresponding uniformity property? In the case T(P) = P, the answer to the first questions is yes; the answer to the second is no. However, bootstrap confidence statements about T(P) can be made uniform over a restricted, though large, class of P. Similar results apply to other functional T(P). 相似文献
125.
126.
Judith A. Cook Lisa Razzano Joseph C. Cappelleri 《Evaluation and program planning》1996,19(4):351-363
This analysis uses canonical correlation techniques to explore client outcomes following psychosocial rehabilitation services in two rehabilitation areas: vocational and residential. At issue are the ways in which these two outcomes are affected by a series of eight client characteristics and service delivery features. The overarching question is the effectiveness of the program in establishing independence vocationally and residentially, and whether the same set of factors influences these two outcomes for persons with mental illness. Subjects were 212 ex-clients of a psychosocial rehabilitation agency who were working six months after leaving the program. The analysis derived two canonical functions both of which were significant. Canonical loadings and cross loadings indicated that client level of functioning and program tenure loaded most strongly with residential status on the first canonical variate while education loaded most strongly with salary on the second. These results support the notions that different predictors account for the variance associated with different outcomes following psychosocial rehabilitation. Discussion of the relevance of strong predictor variables highlights ways they can impact program design. Finally, the usefulness of canonical correlation in longitudinal program evaluation research is explored. 相似文献
127.
Bret Larget Donald L. Simon Joseph B. Kadane 《Journal of the Royal Statistical Society. Series B, Statistical methodology》2002,64(4):681-693
Summary. The determination of evolutionary relationships is a fundamental problem in evolutionary biology. Genome arrangement data are potentially more informative than deoxyribonucleic acid sequence data for inferring evolutionary relationships between distantly related taxa. We describe a Bayesian framework for phylogenetic inference from mitochondrial genome arrangement data using Markov chain Monte Carlo methods. We apply the method to assess evolutionary relationships between eight animal phyla. 相似文献
128.
Jean‐Joseph Cadilhon Paule Moustier Nigel D. Poole Phan Thi Giac Tam Andrew P. Fearne 《Development policy review : the journal of the Overseas Development Institute》2006,24(1):31-49
This article describes the development of vegetable marketing in Ho Chi Minh City (Vietnam), where modern distribution outlets are competing fiercely with traditional traders for wholesale and retail customers. Data from interviews with supply chain stakeholders and a survey of vegetable wholesalers have been used to compare the performance of modern and traditional chains, and the findings reveal the chains as segmented in their product focus, the modern sector focusing exclusively on quality. Modern marketing channels are generally more efficient than traditional ones but still account for only around 2% of vegetable distribution. The article argues that policy‐makers should not promote the ‘modernisation’ of food systems at the expense of traditional channels which meet important consumer needs. 相似文献
129.
In this paper we show that exclusive representation and other union security agreements contribute substantially to union
strength. A regression analysis of the growth of unionism among teachers during the 1970s measures just how potent exclusive
representation and dues checkoff agreements are in stimulating union growth in the public sector. Further discussion prompts
the conclusion that these powerful measures are especially inappropriate in the public sector, for they excessively coerce
employees’ representation and benefit employers, not employees. 相似文献
130.
M. D. Pugh Joseph B. Perry Jr. Eldon E. Snyder Elmer Spreitzer 《The Sociological quarterly》1972,13(4):525-532
This paper replicates an earlier study of faculty status and tolerance of political dissent by Abramson and Wences. The data support the hypothesis that length of residence on a university campus is inversely related to faculty tolerance of student dissent. The expected relationship between academic rank and tolerance was eliminated by controlling for longevity, but the predicted relationship between academic field and tolerance was unaffected. The effect of longevity appears to be independent of political orientations, and the data suggest that peer group influence is operative among faculty members. 相似文献