排序方式: 共有71条查询结果,搜索用时 109 毫秒
31.
Emilia Del Bono Andrea Weber Rudolf Winter‐Ebmer 《Journal of the European Economic Association》2012,10(4):659-683
In this paper we investigate how career considerations may affect fertility decisions in the presence of a temporary employment shock. We compare the birth rates of women displaced by a plant closure with those of women unaffected by job loss after establishing the pre‐displacement comparability of these groups. Our results reveal that job displacement reduces average fertility by 5%–10%, and that these effects are largely explained by the response of women in more skilled occupations. We offer an explanation of our results based on career interruptions of women. 相似文献
32.
The backgrounds and roles of school interpreters who provide interpretation services for limited English proficient students were investigated through a survey study. The results are based on a total of 89 interpreters working in schools throughout New York State. A total of 29 languages were represented in the two samples of interpreters with Spanish being the most frequently used language. Most of the interpreters had Bachelors Degrees or higher but very few had any formal training in interpretation. The results suggest that most interpreters work on a part-time basis. The interpreters reported providing services for a number of different school personnel while fulfilling numerous roles that included interpreting during assessment sessions as well as during parent meetings. The implications of the findings are discussed from the perspectives of the training and recruiting of school interpreters. The limitations of the findings are also examined. 相似文献
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The paper deals with the matter of producing geographical domains estimates for a variable with a spatial pattern in presence of incomplete information about the population units location. The spatial distribution of the study variable and its eventual relations with other covariates are modeled by a geoadditive regression. The use of such a model to produce model-based estimates for some geographical domains requires all the population units to be referenced at point locations, however typically the spatial coordinates are known only for the sampled units. An approach to treat the lack of geographical information for non-sampled units is suggested: it is proposed to impose a distribution on the spatial locations inside each domain. This is realized through a hierarchical Bayesian formulation of the geoadditive model in which a prior distribution on the spatial coordinates is defined. The performance of the proposed imputation approach is evaluated through various Markov Chain Monte Carlo experiments implemented under different scenarios. 相似文献
35.
In the wake of Esping‐Andersen's and Pierson's landmark publications, comparative welfare state research has revolved around the retrenchment of social policy and the transformation of welfare state regimes. One of the chief problems of these studies is the treatment of time. Very often, changes are incremental and their real impacts are not immediately visible but take years or even decades before the consequences fully materialize. The purpose of this paper is to discuss those incremental processes—that consist of series of smaller “not‐system‐shifting changes”—which may gradually change central features of a welfare state. Pension programmes, spanning long time periods, provide a good example. Only in some rare cases were pension schemes reformed in one step and in such a way that one can definitely ascertain a system shift. Most changes, however, are gradual, and recurrently enacted minor adjustments seem to leave the basic principles of the scheme intact. In this paper pension reform policies in Germany and Finland will be used to answer the question of when a change is big enough to be labelled as a system shift. It is argued that small “not‐system‐shifting” changes of the last two decades will eventually alter the basic characteristics of old‐age security in both countries. 相似文献
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The conceptions on shops and factories of a group of 3rd-grade children were assessed by means of the Piagetian clinical method. Factorial analysis showed that children's answers about the two economic institutions yielded two distinct factors. Children were then divided into three groups (one control and two experimental); children in the experimental groups were taught, by means of two different training procedures, how the shopkeeper can earn a profit. A post-test interview, one month later, showed that both experimental groups had progressed in the target notion; however, children did not generalize to the factory what they had learned about shops. According to these results, 3rd-graders' thinking about economics consists of separate part-systems, which will eventually become integrated as children grow older. 相似文献
37.
Víctor Leiva Emilia Athayde Cecilia Azevedo Carolina Marchant 《Journal of applied statistics》2011,38(12):2819-2838
In this paper, we discuss a Birnbaum–Saunders distribution with an unknown shift parameter and apply it to wind energy modeling. We describe structural aspects of this distribution including properties, moments, mode and hazard and shape analyses. We also discuss estimation, goodness of fit and diagnostic methods for this distribution. A computational implementation in R language of the obtained results is provided. Finally, we apply such results to two unpublished real wind speed data from Chile, which allows us to show the characteristics of this statistical distribution and to model wind energy flux. 相似文献
38.
Evangelista WL de Fátima Tinoco I de Souza AP Minette LJ da Costa Baeta F da Silva EP de Oliveira LA 《Work (Reading, Mass.)》2012,41(Z1):5392-5394
Companies have increasingly sought strategies that will ensure a more competitive position in the marketplace. Among these strategies adopted by companies include the health and welfare of the worker, factors currently valued by consumers, especially those of most demanding market. Thus, the postural analysis is of great importance and interest because it is the study of positioning related to body parts like head, torso and limbs, capable of producing loads that may be excessive or insufficient causing disturbances in the muscle skeletal system worker. The aim of this study was to perform a postural analysis of the main sectors of workers (slaughter, cutting room, special cuts, packaging and dispatch) of a typical refrigerator pig industry in Brazil during the execution of their daily activities as well as developing proposals to minimize and/or eliminate the diseases and accidents. The study followed the safety norms of Brazilian Ministry of Labor and Employment. The posture analysis used the OWAS (Ovako Working Posture Analyzing System) methodology. The postures assumed by workers in the sector of packaging were as the most in need of emergency and quick action. 相似文献
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The objective of this work is to map, in a limited area inside and outside of the worksite, the environmental impact generated by sound pollution coming from the driving of foundation piles for high rise buildings, as well as to observe and check if the noise levels produced by the emitting source are tolerable in the urban environment. The methodology of the work includes a survey of technical references about the subject; measurement of noises surrounding the worksite during the foundation phase for four distinct buildings, with different types of piles: prefabricated piles, continuous helical displacement piles , traditional compaction piles and Terra Probe compaction piles. A grid of points was built due to the time of driving and after that the measurements of environmental noises were performed emitted by the execution of each type of pile using a sound level meter. The interpretation of the measurements and their impacts on the neighborhood of the building were performed using the computational tool Suffer for creating noise level contours. The X and Y axes of the grid represent the distances in meters of the area studied and the Z axis represents the noise measured in dB. The contours developed represent the mapping of the noise at the worksites and their surroundings. The mapping of the urban impact of noise, the measurement of its dimensions, and the examination of its propagation around the building are important subsides to adequate individual and collective protection procedures. Seventy one points were measured at four building sites with different types of piles, and the results showed that at only three points was the noise within the limits of the Municipal Law of Recife of 70 dB, which proves the relevance of the research. Finally, the comparative analysis between the four types of piles shows that the continuous helical displacement pile emits the lowest noise level among the four pile types studied. 相似文献
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Anni Kangas Daria Krivonos Inna Perheentupa Saara Särmä 《International Feminist Journal of Politics》2019,21(3):355-382
This article explores the potential of collage epistemology to cultivate queer intellectual curiosity about international relations. It argues that collaging and queering share many points of departure: in both, objects are taken from their conventional contexts and assembled into new relational constellations. The article draws from pedagogical work where collages were used in university teaching on the politics of gender and sexuality. A set of collages made by students are interpreted and brought into a dialogue with queer theorizing. The article suggests that collaging involves smashing a variety of containers that social sciences inquiry often operates with. It troubles not only established conceptions of sexuality and intimacy but also territoriality and theorizing. On this basis, the article concludes that collaging offers a fruitful modality of thought, analysis and expression for queer world-making projects. 相似文献