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In this article, we study large deviations for non random difference ∑n1(t)j = 1X1j ? ∑n2(t)j = 1X2j and random difference ∑N1(t)j = 1X1j ? ∑N2(t)j = 1X2j, where {X1j, j ? 1} is a sequence of widely upper orthant dependent (WUOD) random variables with non identical distributions {F1j(x), j ? 1}, {X2j, j ? 1} is a sequence of independent identically distributed random variables, n1(t) and n2(t) are two positive integer-valued functions, and {Ni(t), t ? 0}2i = 1 with ENi(t) = λi(t) are two counting processes independent of {Xij, j ? 1}2i = 1. Under several assumptions, some results of precise large deviations for non random difference and random difference are derived, and some corresponding results are extended. 相似文献
74.
贺静婷 《陕西青年管理干部学院学报》2010,(2):73-77
我国旧的公司法虽然规定“同股同权,股权平等”,但却无具体的规定和措施来保障小股东权益,中小股东权益受到很大的侵害。2005年修改后的《公司法》赋予了中小股东一系列的自益权和共益权,但是修改后的《公司法》并没有彻底改变中小股东受大股东摆布的命运,在具体制度方面还缺乏必要的规范。本文旨在分析目前中小股东权利保护相关规定的不足,并提出了完善中小股东权益保护机制的几点建议。 相似文献
75.
Zangin Zeebari 《Journal of applied statistics》2012,39(12):2627-2638
In this paper, the ridge estimation method is generalized to the median regression. Though the least absolute deviation (LAD) estimation method is robust in the presence of non-Gaussian or asymmetric error terms, it can still deteriorate into a severe multicollinearity problem when non-orthogonal explanatory variables are involved. The proposed method increases the efficiency of the LAD estimators by reducing the variance inflation and giving more room for the bias to get a smaller mean squared error of the LAD estimators. This paper includes an application of the new methodology and a simulation study as well. 相似文献
76.
讨论了双Poisson风险模型以及带干扰的双Poisson风险模型,给出了其偏差的一个索赔额尾分布的渐进估计. 相似文献
77.
We considered the problem of estimating effects in the following linear model for data arranged in a two-way table: Response = Common effect + Row effect + Column effect + Residual. This work was occasioned by a project to analyse Federal Aviation Administration (FAA) data on daily temporal deviations from flight plans for commercial US flights, with rows and columns representing origin and destination airports, respectively. We conducted a large Monte Carlo study comparing the accuracy of three methods of estimation: classical least squares, median polish and least absolute deviations (LAD). The experiments included a wide spectrum of tables of different sizes and shapes, with different levels of non-linearity, noise variance, and percentages of empty cells and outliers. We based our comparison on the accuracy of the estimates and on computational speed. We identified factors that significantly affect accuracy and speed, and compared the methods based on their sensitivity to these factors. We concluded that there is no dominant method of estimation and identified conditions under which each method is most attractive. 相似文献
78.
Gilles R. Ducharme 《Revue canadienne de statistique》1995,23(4):421-424
In a regression model with univariate response, the quantities derived from the least-absolute-deviations method need not be unique. In this note, we show that, contrary to the univariate case, in a regression model with multivariate response, the least-distances method typically yields quantities that exhibit uniqueness properties that are similar to those obtained by the least-squares method. 相似文献
79.
WTO下的幼稚产业适度保护体系研究 总被引:3,自引:0,他引:3
对幼稚产业概念进行界定 ,分析产业保护政策的本质 ;并分析了“过度”保护的实质和适度保护的控制 ;比较系统地、全面地分析幼稚产业保护体系及产业保护机理 ;提出 WTO下的产业保护对策。 相似文献
80.
Joel Michalek 《统计学通讯:理论与方法》2013,42(3):241-250
An empirical distribution function Fm, defined on a subset of order statistics of a random sample of size n taken from the distribution of a random variable with continuous distribution function F, is shown to converge uniformly with probability one to F. Small sample distributions of the one and two sided deviations and the asymptotic normality of the standardized Fm are established. The relative efficiency of Fm as compared to the classical empirical distribution function is calculated and tabled. for n = 10, 20, 50, 100, 200. 相似文献