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91.
近年来,对于我国劳动力供给优势减弱以及劳动力成本上升的问题,不少学者利用刘易斯模型分析了其原因,并提出各种促进、完善我国农村剩余劳动力转移机制的政策措施。文章仍从分析这一问题的经典模型——刘易斯模型入手,但重点借鉴了日本的成功经验,为促进我国农村剩余劳动力转移提出了一系列对策。 相似文献
92.
For the linear-exponential distribution with increasing hazard rate, exact and explicit expressions for means, product moments and percentage points of order statistics are obtained. Some recurrence relations for both single and product moments of order statistics are also derived. These recurrence relations would enable one to obtain all the higher order moments of order statistics for all sample sizes from those of the lower order 相似文献
93.
The current financial turbulence in Europe inspires and perhaps requires researchers to rethink how to measure incomes, wealth, and other parameters of interest to policy-makers and others. The noticeable increase in disparities between less and more fortunate individuals suggests that measures based upon comparing the incomes of less fortunate with the mean of the entire population may not be adequate. The classical Gini and related indices of economic inequality, however, are based exactly on such comparisons. It is because of this reason that in this paper we explore and contrast the classical Gini index with a new Zenga index, the latter being based on comparisons of the means of less and more fortunate sub-populations, irrespectively of the threshold that might be used to delineate the two sub-populations. The empirical part of the paper is based on the 2001 wave of the European Community Household Panel data set provided by EuroStat. Even though sample sizes appear to be large, we supplement the estimated Gini and Zenga indices with measures of variability in the form of normal, t-bootstrap, and bootstrap bias-corrected and accelerated confidence intervals. 相似文献
94.
The paper considers a problem of equality of two covariance operators. Using functional principal component analysis, a method for testing equality of K largest eigenvalues and the corresponding eigenfunctions, together with its generalization to a corresponding change point problem is suggested. Asymptotic distributions of the test statistics are presented. 相似文献
95.
Friedhelm Nachreiner Heino Lübeck-Plöger Hiltraud Grzech-Sukalo 《Work and stress》2013,27(2-3):227-234
Abstract Factor analyses of health complaints in groups with different length of shiftwork exposure show that the structure of these complaints changes with increasing shift experience, indicating the emergence of a shift-specific pattern of health complaints. After about 15 years of shiftwork, complaints related to disturbances of circadian-controlled functions can be found in the first factor whereas other complaints have their dominant loadings on a separate factor, representing general, non-shift-specific impairments. The results indicate that in this way shift-specific components of health impairment can be separated from other non-shift related components. 相似文献
96.
刘茹 《聊城大学学报(社会科学版)》2011,(2):266-268
教育需要乌托邦精神,教育的终极目标是实现人的全面发展;教育是社会变革的"阿基米德点",或大或小的内部变化都将会渗透到社会的各个子机构中;认清必要的乌托邦中教育可能存在的问题,才能保证教育朝着健康、有益、良性的方向发展。 相似文献
97.
98.
The paper gives an asymptotic distribution of a test statistic for detecting a change in a mean of random vectors with dependent components. The studied test statistic has a form of a maximum of a square Euclidean norms of vectors with components being standardized partial cumulative sums of deviations from means. The limit distribution was obtained using a result of Piterbarg [1994. High deviations for multidimensional stationary Gaussian processes with independent components. In: Zolotarev, V.M. (Ed.), Stability Problems for Stochastic Models, pp. 197–210]. 相似文献
99.
汪正平 《长春理工大学学报(社会科学版)》2010,23(6):100-102
库切近作《凶年记事》以书中主要人物C先生为视角,深刻揭示了当今社会民主进程中有关政治、经济、道德等方面存在的霸权现象,大胆挑战了普世的理性法则和价值标准,对人们的心理乃至生理上产生的矛盾和困惑做了客观深入的描述。平行发展和交替的多重叙事线,在对立和互补的叙事背后呈现多层次的阅读视野。在对当今黑暗世界的拷问中,库切开启了读者思想的闸门,并以其敏锐的观察和深度的反思唤起了人类对理性价值的思考和对各种隐性霸权的批判。 相似文献
100.
We consider a new class of scale estimators with 50% breakdown point. The estimators are defined as order statistics of certain subranges. They all have a finite-sample breakdown point of [n/2]/n, which is the best possible value. (Here, [...] denotes the integer part.) One estimator in this class has the same influence function as the median absolute deviation and the least median of squares (LMS) scale estimator (i.e., the length of the shortest half), but its finite-sample efficiency is higher. If we consider the standard deviation of a subsample instead of its range, we obtain a different class of 50% breakdown estimators. This class contains the least trimmed squares (LTS) scale estimator. Simulation shows that the LTS scale estimator is nearly unbiased, so it does not need a small-sample correction factor. Surprisingly, the efficiency of the LTS scale estimator is less than that of the LMS scale estimator. 相似文献