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101.
M.A. Ali 《统计学通讯:理论与方法》2013,42(12):4491-4500
This paper studies a class of shrinkage estimators of the vector of regression coefficients. The small disturbance approximations for the bias and the mean squared error matrix of the estimator are derived. In the sense of mean squared error, these estimators dominate the least squares estimator and the generalized Stein estimator developed by Hosmane (1988). 相似文献
102.
Weibull, Burr, Pareto and power function distributions have been characterized through the conditional moments of order statistics with higher gap and some of its important deductions are discussed. 相似文献
103.
Supranee Lisawadi S. Ejaz Ahmed Orawan Reangsephet Muhammad Kashif Ali Shah 《统计学通讯:理论与方法》2019,48(13):3236-3257
The simultaneous estimation of Cronbachs alpha coefficients from q populations under the compound symmetry assumption is considered. In a multi-sample scenario, it is suspected that all the Cronbachs alpha coefficients are identical. Consequently, the inclusion of non-sample information (NSI) on the homogeneity of Cronbachs alpha coefficients in the estimation process may improve precision. We propose improved estimators based on the linear shrinkage, preliminary test, and the Steins type shrinkage strategies, to incorporate available NSI into the estimation. Their asymptotic properties are derived and discussed using the concepts of bias and risk. Extensive Monte-Carlo simulations were conducted to investigate the performance of the estimators. 相似文献
104.
Ghassan Dibeh Ali Fakih Walid Marrouch 《International migration (Geneva, Switzerland)》2018,56(1):5-22
This article studies the determinants of youth emigration decisions, which is considered one of the main causes of ‘Brain Drain’ in Arab Mediterranean Countries (AMCs). We focus on the case of Lebanon using a unique dataset covering young people aged 15 to 29 from the year 2016. The aim of the article is to identify the profile of youth's propensity to emigrate from Lebanon. The empirical results indicate that youth from non‐wealthy backgrounds living in smaller dwellings have a higher propensity to emigrate. It is also found that being male and unemployed has a positive effect on migration. Moreover, university education promotes the willingness to emigrate; while residents of poor regions are more likely to express such willingness. Finally, the article provides some insights for policymakers. 相似文献
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苏伊士运河大学中文系、孔子学院是埃及汉语教学的重要基地,自成立以来,在埃中双方的共同努力下,发展较为迅速,已经培养了两届70多名本科毕业生,培训了1400多名社会各界人士,为埃及苏伊士运河沿岸地区的贸易、旅游、教育、建筑、轻工及食品等行业输送了急需的汉语人才,在汉语语言推广和中国文化传播方面发挥着越来越重要的作用. 相似文献
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Carla VandeWeerd Jaime Corvin Martha Coulter Elizabeth Perkins Robin Telford Ali Yalcin 《Journal of women & aging》2014,26(2):127-145
In contrast to younger populations, little attention has been paid to the increase in seniors using Internet-based venues to find relationships and the potential risk for adverse outcomes this poses. This study examined data collected via an online survey from 45 ethnically diverse women aged 50+ “seeking relationships” on MySpace. The majority of women reported a relationship with someone they met online (85%). They also reported experiencing adverse events including financial exploitation (40%), threats (55%), and physical harm (38%) by someone they met online at levels greater than traditional relationship seeking in the general population. Directions for future research are explored. 相似文献
109.
贺阿丽 《山西高等学校社会科学学报》2008,20(7):133-134
莎士比亚早期的戏剧《罗密欧与朱丽叶》是世界文学史、戏剧史上的著名悲剧之一。这部剧虽然不同于他中期创作的那些著名的悲剧,但同样是对于人类社会和人类本性当中的必然性悲剧因素的思考。在《罗密欧与朱丽叶》这部剧中,是一系列偶然性的情节导致了最终必然的毁灭。罗密欧与朱丽叶注定的命运,在整部剧中人物的对话中都有预兆。 相似文献
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