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181.
This paper investigates the heterogeneity of ethnic employment gaps using a new single-index based approach. Instead of stratifying our sample by age or education, we study ethnic employment gaps along a continuous measure of employability, the employment probability minority workers would have if their characteristics were priced as in the majority group. We apply this method to French males, comparing those whose parents are North African immigrants and those with native parents. We find that both the raw and the unexplained ethnic employment differentials are larger for low-employability workers than for high-employability ones. We show in a theoretical framework that this heterogeneity can be accounted for by homogeneous underlying mechanisms and is not evidence for, say, heterogeneous discrimination. Finally, we discuss our main empirical findings in the light of simple taste-based vs. statistical discrimination models. 相似文献
182.
Roland J. Schuster 《Gruppendynamik und Organisationsberatung》2016,47(2):181-191
The paper describes an intervention research process within an organization. Goal of the research was to optimize the work process of a workgroup. A case study shows applied methods of intervention research in detail. Consideration of a combination of hierarchical organization and e.?g. project teams or workgroups provides the context of the paper. Inherent contradictions regarding hierarchical organization and workgroups and the involved challenges for employees are addressed. 相似文献
183.
We propose generalized linear models for time or age-time tables of seasonal counts, with the goal of better understanding
seasonal patterns in the data. The linear predictor contains a smooth component for the trend and the product of a smooth
component (the modulation) and a periodic time series of arbitrary shape (the carrier wave). To model rates, a population
offset is added. Two-dimensional trends and modulation are estimated using a tensor product B-spline basis of moderate dimension.
Further smoothness is ensured using difference penalties on the rows and columns of the tensor product coefficients. The optimal
penalty tuning parameters are chosen based on minimization of a quasi-information criterion. Computationally efficient estimation
is achieved using array regression techniques, avoiding excessively large matrices. The model is applied to female death rate
in the US due to cerebrovascular diseases and respiratory diseases. 相似文献
184.
Toby A. Patterson Alison Parton Roland Langrock Paul G. Blackwell Len Thomas Ruth King 《AStA Advances in Statistical Analysis》2017,101(4):399-438
With the influx of complex and detailed tracking data gathered from electronic tracking devices, the analysis of animal movement data has recently emerged as a cottage industry among biostatisticians. New approaches of ever greater complexity are continue to be added to the literature. In this paper, we review what we believe to be some of the most popular and most useful classes of statistical models used to analyse individual animal movement data. Specifically, we consider discrete-time hidden Markov models, more general state-space models and diffusion processes. We argue that these models should be core components in the toolbox for quantitative researchers working on stochastic modelling of individual animal movement. The paper concludes by offering some general observations on the direction of statistical analysis of animal movement. There is a trend in movement ecology towards what are arguably overly complex modelling approaches which are inaccessible to ecologists, unwieldy with large data sets or not based on mainstream statistical practice. Additionally, some analysis methods developed within the ecological community ignore fundamental properties of movement data, potentially leading to misleading conclusions about animal movement. Corresponding approaches, e.g. based on Lévy walk-type models, continue to be popular despite having been largely discredited. We contend that there is a need for an appropriate balance between the extremes of either being overly complex or being overly simplistic, whereby the discipline relies on models of intermediate complexity that are usable by general ecologists, but grounded in well-developed statistical practice and efficient to fit to large data sets. 相似文献
185.
186.
Roland K. Yeo 《Human Resource Development International》2013,16(3):317-330
The paper discusses problem-based learning (PBL) as a mediating factor in generating a variety of learning networks in workplace contexts. It is argued that informal learning in experiential circumstances can be systematized to encourage deep learning at the individual and collective level. Given the distinct problem-solving opportunities in PBL, learners can increase their capacity to acquire new knowledge through self-inquiry, reflection and dialogue. The repositioning of learning attitudes also leads to an enlargement of communities of practice wherein double and triple-loop learning cycles intersect to create rigorous learning. An integrated model is proposed to explain the dynamics of PBL operating within the constraints of workplace contexts. 相似文献
187.
The occurrence of stockouts remains an unsolved problem for retailers that provoke severe revenue and image losses, as well as greater customer dissatisfaction for both retailers and manufacturers. A literature review suggests a model of influential antecedents of consumers’ reactions to product unavailability. A field study then provides insights into true stockout situations, unlike a hypothetical research setting. With these data, this study reveals that loyalty and the presence of product alternatives have the greatest impacts on customer reactions. This result has significant theoretical and managerial implications due to the fact that results based on hypothetical settings did not hold. 相似文献
188.
Roland W. B. Blonk Veerle Brenninkmeijer Suzanne E. Lagerveld Irene L. D. Houtman 《Work and stress》2006,20(2):129-144
We investigated the effectiveness of cognitive behavioural therapy (CBT) and a combined intervention of workplace- and individual-focused techniques among self-employed people on sick leave owing to work-related psychological complaints (such as anxiety, depression, and burnout). Both interventions were based on CBT; however, one was conducted by psychotherapists and involved extensive CBT, while the other was delivered by “labour experts” and consisted of a brief CBT-derived intervention combined with both individual-focused and workplace interventions. One hundred and twenty-two self-employed people who had applied for sickness benefit from an insurance company enrolled in a randomized controlled design. These individuals were assessed before the intervention and then at 4 months and 10 months after the onset of the intervention. The outcome was assessed based on duration of sick leave until partial and full return to work and on psychological complaints. Significant effects on partial and full return were found in favour of the combined intervention: partial return occurred 17 and 30 days earlier in this group than in the CBT group and the control group, respectively. For full return to work, the difference was approximately 200 days. A decrease in psychological complaints was present in each condition but we found no significant interaction effects. The results suggest that work resumption should be addressed earlier in individuals receiving CBT. This insight is of value for the (scarce) literature concerning interventions for individuals who are on sick leave owing to work-related psychological complaints. 相似文献
189.
In Germany, processes can be observed that have long been out of keeping with the principle of equality of opportunity. Unemployment
is concentrated in the structurally weak peripheral areas, in Eastern Germany in particular; emigration of young and better-educated
people to the West is not diminishing, but contrary to expectation is again on the increase; aging processes have set in already,
and when it comes to the provision of infrastructure, e.g. in the field of professional training, some regions are already
suffering from considerable problems. These difficulties are frequently interpreted as differences between East and West and
are explained away as problems resulting from reunification, such as the deindustrialization and restructuring of the economy
and the enormous decline in the birth rate in Eastern Germany. Although these problems cannot just be attributed to social
transformation and the birth rate crisis alone, being subject to more general processes of intensified globalization and the
aging of society, the increasing regional disparities are rarely considered in the overall context of regional development
patterns throughout Germany.
Moreover, the difficulty of even obtaining data for purposes of comparison generally means that an international yardstick
is lacking when regional developments are analyzed. The present study investigates regional disparities over a period of time
in the light of subjective and objective indicators of the quality of life for individuals. To this end, we make use of data
from the Wohlfahrtssurvey [Welfare Survey] from 1978 to 2001, among other sources. On the basis of the Euromodule that has
been established at the WZB, we compare current regional patterns in Germany with those in other European countries. This
approach makes it possible to provide information on the scale of regional disparities in various different countries, and
to identify privileged and handicapped regions with reference to standards of living and the sense of wellbeing. The study’s
findings show that, in the past 25 years, welfare in Western Germany has evened out at a higher level, but currently a trend
towards increasing economic disparity is discernible. In comparison with other European countries, on the other hand, the
differences (regional differences) within Germany are comparatively slight. 相似文献
190.