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41.
Yihao Yin William H. Aeberhard Stephen J. Smith Joanna Mills Flemming 《Revue canadienne de statistique》2019,47(1):27-45
State‐space models (SSMs) are now popular tools in fisheries science for providing management advice when faced with noisy survey and commercial fishery data. Such models are often fitted within a Bayesian framework requiring both the specification of prior distributions for model parameters and simulation‐based approaches for inference. Here we present a frequentist framework as a viable alternative and recommend using the Laplace approximation with automatic differentiation, as implemented in the R package Template Model Builder, for fast fitting and reliable inference. Additionally we highlight some identifiability issues associated with SSMs that fisheries scientists should be aware of and demonstrate how our modelling strategy surmounts these problems. Using the Bay of Fundy sea scallop fishery we show that our implementation yields more conservative advice than that of the reference model. The Canadian Journal of Statistics 47: 27–45; 2019 © 2018 Statistical Society of Canada 相似文献
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BORN FREE and Integrated Life Planning (ILP) are two efforts that have advanced equity within career development. This article reviews the concepts of BORN FREE and ILP, connecting both efforts to current visions of social justice. 相似文献
45.
Morris H. Hansen 《The American statistician》2013,67(3):1-18
Letters to the editor will be confined to discussions of papers that have appeared in The American Statistician and of important issues facing the statistical community. Letters discussing papers in The American Statistician must be received within two months of publication of the paper; the author of the paper will then be given an opportunity to reply, and the letters and reply will be published together. All letters to the editor will be refereed. Corrections of errors that have been noted in papers published in The American Statistician will be listed as corrections at the end of this section. 相似文献
46.
Federal initiatives since 1996 have intensified the efforts of states to achieve adoption for children in foster care. For many waiting children, the path to adoption is long. The authors offer an economic analysis of adoption from foster care, with an emphasis on the reasons why achieving the goal of adoption for all waiting children may be so difficult. The authors then estimate the determinants of adoptions from foster care across the states using data for fiscal years 1996 and 1997. Adoption assistance subsidy rates stand out as the most important determinant of adoptions from foster care, followed by use of alternatives (e.g., intercountry adoption). Adoptive matching on the basis of race does not appear to prevent adoptions from foster care in the aggregate, leaving flaws in the matching process, such as a lack of information and difficulty using the Interstate Compact on the Placement of Children (ICPC), as a primary reason why children wait. 相似文献
47.
Norm setting has been shown to be a crucial element of effective drug education. The purpose of this study was to examine the degree to which a videotape describing concepts and methods for establishing positive norms would enhance standard training. Participants included 35 teachers and 64 health education students who were randomly assigned to the standard training condition or the video-enhanced training. Participants completed pretest and posttest measures of beliefs, attitudes, and knowledge concerning prevention methods. Both the standard and the video-based instruction produced improved understanding of norms and norm setting prevention methods. However, the video-based instruction resulted in several notable improvements beyond what was achieved in standard instruction. Video training can be an important tool as research-based drug abuse prevention achieves wide-scale dissemination. It offers a way of standardizing training and has the potential to increase the fidelity with which prevention programs are implemented. 相似文献
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Hansen A 《The International migration review》1981,15(1-2):175-194
"The following study of Angolan refugees in Zambia examines the decision-making dynamics of refugee movements, documents a case of extensive self-settlement, describes the background to the refugee movement, and briefly compares the welfare of self-settling refugees and those who are in government schemes." 相似文献
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In this article we examine what affects the board of directors’ involvement in the advice to management, with emphasis on
the influence of crises on the board advisory tasks performance. Based on a survey of 881 small Norwegian firms, we analyse
responses from CEOs in order to determine whether and to what extent the board is actively involved in the governance process
during crises through providing advice. The study has two major contributions to board research in general and research of
into small firms in particular. The first is the go beyond the “usual suspects” of board size, CEO duality, and board independence
when looking for determinants of board involvement in advice. The second contribution is a clearer understanding of board
involvement during crises. Our results show that board member diversity becomes particularly important during crises, since
this provides the CEO and firm access to a more diverse pool of competences and experiences. We also find that crises moderate
the effects of incentive on the board’s involvement in advice. This evidence sheds new light on the determinants of directors’
involvement in board tasks, suggesting that directors’ incentive to perform certain board tasks vary according to the contingent
situation the firm is experiencing. 相似文献
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