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241.
We investigate whether volunteering has a causal effect on individual employment opportunities. To this end, a field experiment is conducted in which volunteering activities are randomly assigned to fictitious job applications sent to genuine vacancies in Belgium. We find that volunteers are 7.3 percentage points more likely to get a positive reaction to their job applications. The volunteering premium is higher for females but invariant with respect to the number of engagements. 相似文献
242.
243.
Po-Wen Ku Kenneth R. Fox Chun-Yi Chang Wen-Jung Sun Li-Jung Chen 《Social indicators research》2014,117(3):705-718
Physical activity takes place in different social contexts such as leisure, home, and work. However, the differential associations of these distinct categories of activity with aspects of well-being have rarely been investigated. This study was designed to estimate independent associations of (a) leisure-time, (b) domestic and (c) work-related physical activities with subjective well-being in older adults. A cross-sectional survey was conducted in 2009 with 2,295 community-dwelling older adults aged 65 or older in Kaohsiung, Taiwan. Among them, 307 participants were selected for a 3-year follow-up study in 2012. The results based on cross-sectional and longitudinal analyses demonstrated that leisure-time physical activity, after multivariate adjustment, was positively associated with five dimensions of well-being, including ‘physical’, ‘psychological’, ‘independence’, ‘learning and growth’, and ‘social’ well-being. Household physical activity was positively associated only with ‘social’ well-being. Occupational physical activity was not related to any dimension of well-being. The study suggests that associations between physical activity and dimensions of subjective well-being during later life are dependent on the social context in which the activity takes place. This study indicates that physical activity taken as leisure has greatest potential to enhance the quality of life of older adults. 相似文献
244.
Wanning Sun 《Feminist Media Studies》2013,13(1):57-71
Chinese television dramas over the past decades have seen the rise and decline of various narratives, but no other narratives speak to the emerging urban middle class's fear and anxiety more palpably than the stories of the maid. However, despite the growing popularity of the maid stories among urban viewers, most of these stories do not resonate with domestic workers themselves. How do we make sense of the growing popularity of the maid stories among urban viewers? And how do we account for the differentiated capacity to resonate and identify with the characters among viewers? These are important questions to consider if one is to understand the new cultural politics of power and social formations in post-Mao China. In this paper, I explore some of the crucial ways in which a controlling gaze is facilitated and naturalised by the visualisation of place and space in these dramas. Then, through both critical analyses and engaged ethnography, I demonstrate how two sets of controlling gaze—everyday and televisual—reinforce and justify each other. Finally, I advance the concept of “peripheral vision,” which, I show, denies the modernist “master” narrative of the city and, instead, empowers the subaltern figure with an epistemological position of “eye-witness” and anthropologist of the city. 相似文献
245.
There is finally precise information about the reform in endowment insurance to abolish thedouble-track system.On December 23,2014,Mr.Ma Kai,Vice Premier of the State Council,delivered a work report on behalf of the State Council at the 12th Session of the Standing Committee of the Twelfth National People’s Congress about the progress made in comprehensively advancing the establishment of urban 相似文献
247.
本文不仅从“教”方而且从“学”方视角,对教学实习成绩进行多级综合评价量化处理,建立一整套客观评定教学实习成绩系统。 相似文献
248.
Guangren Yang Sumin Hou Luheng Wang Yanqing Sun 《Journal of Statistical Computation and Simulation》2018,88(6):1117-1133
The additive Cox model is flexible and powerful for modelling the dynamic changes of regression coefficients in the survival analysis. This paper is concerned with feature screening for the additive Cox model with ultrahigh-dimensional covariates. The proposed screening procedure can effectively identify active predictors. That is, with probability tending to one, the selected variable set includes the actual active predictors. In order to carry out the proposed procedure, we propose an effective algorithm and establish the ascent property of the proposed algorithm. We further prove that the proposed procedure possesses the sure screening property. Furthermore, we examine the finite sample performance of the proposed procedure via Monte Carlo simulations, and illustrate the proposed procedure by a real data example. 相似文献
249.
In this article, we propose a general class of partially linear transformation models for recurrent gap time data, which extends the linear transformation models by incorporating non linear covariate effects and includes the partially linear proportional hazards and the partially linear proportional odds models as special cases. Both global and local estimating equations are developed to estimate the parametric and non parametric covariate effects, and the asymptotic properties of the resulting estimators are established. The finite-sample behavior of the proposed estimators is evaluated through simulation studies, and an application to a clinic study on chronic granulomatous disease is provided. 相似文献
250.
The process of serially dependent counts with deflation or inflation of zeros is commonly observed in many applications. This paper investigates the monitoring of such a process, the first-order zero-modified geometric integer-valued autoregressive process (ZMGINAR(1)). In particular, two control charts, the upper-sided and lower-sided CUSUM charts, are developed to detect the shifts in the mean process of the ZMGINAR(1). Both the average run length performance and the standard deviation of the run length performance of these two charts are investigated by using Markov chain approaches. Also, an extensive simulation is conducted to assess the effectiveness or performance of the charts, and the presented methods are applied to two sets of real data arising from a study on the drug use. 相似文献