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The Cochran–Mantel–Haenszel tests are a suite of tests that are usually defined as conditional tests, tests that assume all marginal totals are known before sighting the data. Here unconditional analogues of these tests are defined for the more usual situation when the marginal totals are not known before sighting the data.  相似文献   
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This study uses ethnographic research to examine the phenomenon of transnational parenting by migrant mothers from the African Caribbean community and their family who care for the mothers’ children. Twenty women’s narratives demonstrate the complexity of relationships between migrant mothers living and working in New York City and their extended family or kinship caretakers who coparent their children in their countries of origin. The study reveals three main factors that contribute to the success of transnational parenting: (1) informal kinship care-child fostering, (2) remittances, and (3) social networks. Policy and practice implications are explored.  相似文献   
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Summary.  Data in the social, behavioural and health sciences frequently come from observational studies instead of controlled experiments. In addition to random errors, observational data typically contain additional sources of uncertainty such as missing values, unmeasured confounders and selection biases. Also, the research question is often different from that which a particular source of data was designed to answer, and so not all relevant variables are measured. As a result, multiple sources of data are often necessary to identify the biases and to inform about different aspects of the research question. Bayesian graphical models provide a coherent way to connect a series of local submodels, based on different data sets, into a global unified analysis. We present a unified modelling framework that will account for multiple biases simultaneously and give more accurate parameter estimates than standard approaches. We illustrate our approach by analysing data from a study of water disinfection by-products and adverse birth outcomes in the UK.  相似文献   
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This article is a response to Amitai Etzioni’s article, “The New Normal,” published in this issue.  相似文献   
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Recent decades have been characterized by growing numbers of awards, prizes, and honors distributed by a wide range of social worlds—prize proliferation. This article examines how claims for—and counterclaims against—establishing prizes lead to more awards being given. Unlike most constructionist analyses that explore how centralized claims‐making campaigns construct social problems, this study of prize proliferation illustrates how localized, independent social worlds can become arenas for claims, and how such largely unrelated efforts can shape broad social trends.  相似文献   
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Acquisitive growth strategies continue to be popular, in spite of increasing evidence that they often do not enhance the financial performance of acquiring firms and may adversely affect innovation. However, some acquisitions are associated with both increases in financial performance and a strengthened commitment to R&D while others experience decreases in both. Multiple theories have been offered to explain acquisitions and their outcomes, but few have received strong empirical support. This paper describes a multiple rater, multiple-case study of acquisitions that had highly favourable outcomes and others that experienced highly unfavourable outcomes. All twelve of the high performing acquisitions studied were found to exhibit the dual characteristics of friendliness during acquisition negotiations and resource complementarities between the two firms. Additionally, debt played an important role in the success (low to moderate debt) or lack of success (high or extraordinary debt) in 21 of the 24 acquisitions studied. Inadequate target evaluation was a factor in 11 of the 12 acquisitions with low performance. Importantly, the results of both sets of acquisitions suggested that a configuration of attributes affected post-acquisition performance. Other findings both supported and contradicted commonly held beliefs about acquisitions, as well as highlighted variables not typically associated with acquisition strategies. The study provides directions for future theory development and empirical research on acquisitions.  相似文献   
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The difficulties associated with conducting valid family therapy research within a clinical practice discourage many potential researchers. This article will describe collaboration between a group of academics, researchers and clinicians who decided to explore the process and efficacy of systemic family therapy conducted within a working private practice. The specific questions we are addressing are, whether the requests clients bring to their first session of therapy can be reliably classified by practitioners, whether these requests change over time, and whether the nature of the request is associated with therapist and client ratings of therapeutic outcome. Additional questions about the form and nature of the therapeutic alliance as experienced by both client and practitioner are also being explored. This paper will map the passage of the work from inception to its current state where over 140 clients are active participants. In doing so attention will be paid to the obstacles encountered: practical, financial and ethical, and the solutions devised to address these.  相似文献   
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Goodness of fit for thei ordered categories discrete uniform distribution can be carried out using Pearson's X2 pstatistic and its components. Applications of this technique are considered and comparisons made with recently suggested empirical uniform distribution  相似文献   
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