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891.
This paper proposes and investigates Fourier series estimators for length biased data. Specifically, two Fourier series estimators are constructed and studied based on ideas of Jones (1991) and Bhattacharyya et al. (1988) in the case of kernel density estimation. Approximate expressions for mean squared errors and integrated mean squared errors are obtained and compared, and some simulated examples are investigated. The Fourier series estimator based on the proposal of Jones seems to have the more desirable properties of the two. The paper concludes with some comments that put this work in a wider context. 相似文献
892.
Loring Jones D.S.W. 《Child and Adolescent Social Work Journal》1991,8(2):101-116
This paper reviews the literature on the family effects of unemployment in order to specify how changes in the economy might effect fathering during periods of unemployment. The purpose for doing so is to provide information to clinicians on how job loss effects family dynamics. This paper is organized around three variables that are seen as influencing the father and child relationship. These variables are: the father's reaction to job loss, the mother's reaction to job loss, and the characteristics of the child. The paper ends with a discussion of the policy and practice implications of the literature. 相似文献
893.
Genichi Taguchi has emphasized the use of designed experiments in several novel and important applications. In this paper we focus on the use of statistical experimental designs in designingproducts to be robust to environmental conditions. The engineering concept of robust product design is very important because it is frequently impossible or prohibitively expensive to control or eliminate variation resulting from environmental conditions. Robust product design enablesthe experimenter to discover how to modify the design of the product to minimize the effect dueto variation from environmental sources. In experiments of this kind, Taguchi's total experimental arrangement consists of a cross-product of two experimental designs:an inner array containing the design factors and an outer array containing the environmental factors. Except in situations where both these arrays are small, this arrangement may involve a prohibitively large amount of experimental work. One of the objectives of this paper is to show how this amount of work can be reduced. In this paper we investigate the applicability of split-plot designs for thisparticular experimental situation. Consideration of the efficiency of split-plot designs and anexamination of several variants of split-plot designs indicates that experiments conductedin a split-plot mode can be of tremendous value in robust product design since they not only enable the contrasts of interest to be estimated efficiently but also the experiments can be considerably easier to conduct than the designs proposed by Taguchi. 相似文献
894.
895.
Ethel B. Jones 《Journal of Labor Research》1992,13(3):257-272
Studies of the large decline in private sector unionism during the 1970s and 1980s focus on explanations particular to those
decades and attribute an inconsequential role to the employment shift from goods-producing to service-producing industries.
Using an adapted version of the Ashenfelter-Pencavel model, this research finds stable parameter estimates between the two
decades and the earlier post-Wagner Act years. Not only are decade-specific explanations found to be unnecessary in understanding
membership decline, but the pivotal relationship in the decline is the relative shift in the employment distribution away
from the traditionally strongly unionized industries. 相似文献
896.
Currently, there is widespread controversy regarding the risks and benefits of hormone therapy for women over 50. The history of hormone therapy provides an excellent example of how different constituencies with competing objectives can produce health practices and policies of questionable benefit. We examine this history from the perspectives of women who now live longer, expecting higher quality of life throughout their later years, healthcare providers who are influenced by the real and perceived needs of their patients as well as information provided by drug manufacturers, the pharmaceutical industry which seeks to identify and promote drugs that offer the most promise for both patients and shareholders, and medical researchers —including the National Institutes of Health and the Federal Drug Administration . 相似文献
897.
898.
Enhancing collaborative tendencies: extending the single identity model for youth conflict education
Jones TS 《New directions for youth development》2004,(102):11-34
A conflict intervention in postapartheid South Africa suggests new insights into encouraging an honest and engaging participation in the dialogue process. 相似文献
899.
900.
The Subtle and Overt Scale of Psychological Abuse (Marshall, 1999a) is a measure designed to examine previously unevaluated forms of psychological abuse. The scale was originally divided into seven subscales (overt: dominance, indifference, monitoring and discrediting; subtle: undermining, discounting, isolating). A sample of 172 women was used to evaluate the construct validity of this measure. In other words, the internal structure of the measure, its relation to other measures of physical and psychological abuse, and its relationship to other psychological outcomes. Empirical and theoretical approaches were used to replicate and examine the dimensions of this scale. Results revealed that this scale represents a unidimensional construct that is highly correlated to other measures of psychological abuse. Implications for future research and practice are discussed. 相似文献