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Hansen PE 《Mathematical Population Studies》1989,2(1):37-67
A review of the Leslie matrix model theory and its literature 1941-1987 is presented. The point of view is that of a mathematician who focuses on the parts of the theory which are relevant to demography. Works of a decidedly applied nature are not dealt with. 相似文献
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Peo Hansen 《Intercultural Education》1998,9(1):5-23
This article aims to explore how the role of education as an aide in the process of “European” identity formation is being articulated in the European Union's (EU) policy of “The European dimension of education”. After having located the EU's views on education in the context of the neo‐liberal discourse on economic globalization, the article goes on to trace EU discussions of the European dimension of education historically. Subsequently, it deliberates on the understanding of European culture and identity which the European dimension of education endeavours to advance. Here a critique is developed of the policy's ethno‐culturalism, thereby excluding delineation of a collective identity in the EU. Basing itself on a notion of cultural identity which, implicitly, includes only those who fit certain versions of European historical “roots” and cultural “heritage”, the policy, it is argued, impedes a discussion of how a trans‐ethnic identity formation could be created in today's EU. Towards the end of the article, a scrutiny of the European dimension's perception of the so‐called “language diversity” in the EU seeks to illustrate this issue further. 相似文献
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This paper explores the experiences of immigrant women with visual impairment in the Greater Toronto and Hamilton Area (GTHA) of Canada. Conceptually, the paper draws from feminist disability theory and critical scholarship on blindness to consider the discursive and material processes shaping women’s experiences across different socio-cultural contexts. Empirically, the paper draws from in-depth interviews with seven women. The analysis is organized around three themes. The first explores women’s understandings of visual impairment. The second examines the ways in which women’s experiences of visual impairment are shaped by meanings and attitudes that circulate within their cultural communities, and the extent to which immigration might challenge or reinforce these meanings. The third examines the shifting barriers and opportunities women face with respect to social and economic participation. We close by identifying the conceptual implications of our research. 相似文献
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Bruce E. Hansen 《Econometric Reviews》2016,35(8-10):1456-1470
This article compares the mean-squared error (or ?2 risk) of ordinary least squares (OLS), James–Stein, and least absolute shrinkage and selection operator (Lasso) shrinkage estimators in simple linear regression where the number of regressors is smaller than the sample size. We compare and contrast the known risk bounds for these estimators, which shows that neither James–Stein nor Lasso uniformly dominates the other. We investigate the finite sample risk using a simple simulation experiment. We find that the risk of Lasso estimation is particularly sensitive to coefficient parameterization, and for a significant portion of the parameter space Lasso has higher mean-squared error than OLS. This investigation suggests that there are potential pitfalls arising with Lasso estimation, and simulation studies need to be more attentive to careful exploration of the parameter space. 相似文献
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Hendrik Wolff 《Econometric Reviews》2016,35(6):1013-1039
In many economic models, theory restricts the shape of functions, such as monotonicity or curvature conditions. This article reviews and presents a framework for constrained estimation and inference to test for shape conditions in parametric models. We show that “regional” shape-restricting estimators have important advantages in terms of model fit and flexibility (as opposed to standard “local” or “global” shape-restricting estimators). In our empirical illustration, this is the first article to impose and test for all shape restrictions required by economic theory simultaneously in the “Berndt and Wood” data. We find that this dataset is consistent with “duality theory,” whereas previous studies have found violations of economic theory. We discuss policy consequences for key parameters, such as whether energy and capital are complements or substitutes. 相似文献
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Pamela Jo Brubaker Scott Haden Church Jared Hansen Steven Pelham Alison Ostler 《Public Relations Review》2018,44(5):741-751
This study explores how online publics are engaging with organizations by creating and sharing brand-related content online, outside corporate-controlled communication environments. This research employs a quantitative content analysis of memes shared on the social networking site Imgur to reveal how user-generated content conveys meaning about organizations. The analysis reveals brand-centric memes are generally classified as orphan memes, or memes that have distinct textual and visual characteristics separating them from established or emerging meme families. Memes about organizations are neither an overwhelming reflection of biting criticism or support, but rather a reflection of online public engagement with organizations that primarily use humor and textual brand features (or quiddities) to convey their commitment and satisfaction with the organization and unite meme families. 相似文献