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121.
122.
Eleanor Cook 《Serials Review》2013,39(1):109-110
123.
Fayçal Hamdi 《统计学通讯:理论与方法》2013,42(22):4182-4199
The purpose of this article is to develop algorithms for computing the exact Fisher information matrix of periodic time-varying state-space models. We first present a relatively simple recursive algorithm which computes the elements of the exact information matrix without involving numerical differentiation, since all required derivatives are analytically evaluated. The proposed algorithm extends the procedure due to Cavanaugh and Shumway (1996) to the periodic state-space framework. Exploiting the approach used in Klein et al. (2000), a second algorithm is proposed in order to obtain the exact information matrix as a whole instead of element by element. The algorithms are first developed in a general framework and then specialized to the case of a periodic Gaussian vector autoregressive moving-average (PVARMA) model. 相似文献
124.
Steven Cook 《统计学通讯:模拟与计算》2013,42(4):756-765
The literature on testing the unit root hypothesis in the presence of GARCH errors is extended. A new test based upon the combination of local-to-unity detrending and joint maximum likelihood estimation of the autoregressive parameter and GARCH process is presented. The finite sample distribution of the test is derived under alternative decisions regarding the deterministic terms employed. Using Monte Carlo simulation, the newly proposed ML t-test is shown to exhibit increased power of relative to rival tests. Finally, the empirical relevance of the simulation results is illustrated via an application to real GDP for the UK. 相似文献
125.
Estimating potential health risks associated with recycled (reused) water is highly complex given the multiple factors affecting water quality. We take a conceptual model, which represents the factors and pathways by which recycled water may pose a risk of contracting gastroenteritis, convert the conceptual model to a Bayesian net, and quantify the model using one expert's opinion. This allows us to make various predictions as to the risks posed under various scenarios. Bayesian nets provide an additional way of modeling the determinants of recycled water quality and elucidating their relative influence on a given disease outcome. The important contribution to Bayesian net methodology is that all model predictions, whether risk or relative risk estimates, are expressed as credible intervals. 相似文献
126.
The purpose of this study was to determine the incidence of anabolic steroid use among competitive male and female bodybuilders in Kansas and Missouri. A profile was established for users and non-users of anabolic steroids. The results of this study indicated that more than half of the male bodybuilders (54%) were using steroids on a regular basis compared to 10 percent of the female competitors. The types of steroid used were investigated and revealed that on average, four different types of anabolic steroid were used during the year, with individual use ranging from one to fifteen different types; including Dianabol, Deca Durabolin, Anavar, Testosterone, Androl 50, Winstrol, Primobolan, Equipoise, Finaject, Parabolin, HCG, Primacetate, Enanthate, Halotestin, and Maxibolin, in order of the most to least frequently used. The female bodybuilders reported that they had used an average of two different steroids including Deca Durabolin, Anavar, Testosterone, Dianabol, Equipoise, and Winstrol. The principal reason bodybuilders used steroids was related to their perception that these drugs were an important factor in winning competitions. Another important motivating factor for use was consistent with reports that significant gains in strength could be achieved by including anabolic steroids as part of the training regimen in spite of the reported adverse side-effects. 相似文献
127.
Peggy S. Berger Judith Powell Alicia Skinner Cook 《Journal of Family and Economic Issues》1988,9(4):297-313
The purpose of this research is to examine the relationship between objective and subjective measures of economic well-being, amount of and satisfaction with control, and perceived stress level of subjects, who have relocated with their families within the past year. Both males and females indicate more stress if their financial condition is worse following the move than before, if their employment status is not satisfying, and when they have little control over their lives and are not satisfied with their level of control. Stress is negatively related to satisfaction with the specific aspects of economic situation studied for both males and females with limited exception.Peggy S. Berger received her Ph.D. from Pennsylvania State University. She is an Associate Professor in the Department of Consumer Sciences, Colorado State University, Fort Collins, CO 80523. Her research interests include socioeconomic issues related to geographic mobility and to gender, and work and family issues.Judith Powell received her Ph.D. from Oklahoma State University. She is a Professor of Child and Family Studies, and Head of the Department of Home Economics, University of Wyoming, Laramie, WY 82071. Her research interests include parent-child relations and effects of relocation on families.Alicia Skinner Cook received her Ph.D. from Arizona State University. She is a Professor in the Department of Human Development and Family Studies at Colorado State University, Fort Collins, CO 80523. Her research interests include grief and loss issues, family stress, and adjustment to relocation. 相似文献
128.
Cook KS Shortell SM Conrad DA Morrisey MA 《Academy of management review. Academy of Management》1985,10(2):337-343
Smith and Mick identify four basic problems with the theory the present writers developed to explain organizational responses (in this case the behavior of hospitals) to regulation. They challenge the basic assumption regarding autonomy, disagree with the implied cause and effect relations between organizational response and regulation, criticize the omission of goals, and claim that the theory has only limited generality. In so doing they state that their primary concern is with "improving our understanding of the limitations and benefits of the theory." Each of the four topics they raise for consideration will receive comment. 相似文献
129.
Ellen Piel Cook 《The Career development quarterly》1994,43(1):85-95
This article describes Super's construct of role salience, and recent literature on gender issues in multiple roles that supports the wisdom of his basic ideas. Gender influences how individuals perceive various roles, role priorities and involvements over time, and role juggling during adulthood. Whether or not men and women report key roles as similarly salient; how they define, enact, and manage these roles may differ substantially. Personal variations in life careers remind counselors to explore clients' own life meanings as expressed in roles. 相似文献
130.