Maximum likelihood estimation for the generalized poisson distribution

The generalized Poisson distribution;containing two

parameters and studied by many researchers; describes the distribution of busy periods under a queueing system and has very interesting properties; The probabilities for successive classes depend upon the previous occurrences; The problem of admissible maximum likelihood estimators for for the parameters Is discussed and a necessary and sufficient condition is derived for which unique admissible maximum likelihood estimators exist; The first; order terms in the biases; variances and the covariance of these maximum likelihood estimators are obtained.     

Bayesian Approaches to Nonparametric Estimation of Densities on the Unit Interval

This paper investigates nonparametric estimation of density on [0, 1]. The kernel estimator of density on [0, 1] has been found to be sensitive to both bandwidth and kernel. This paper proposes a unified Bayesian framework for choosing both the bandwidth and kernel function. In a simulation study, the Bayesian bandwidth estimator performed better than others, and kernel estimators were sensitive to the choice of the kernel and the shapes of the population densities on [0, 1]. The simulation and empirical results demonstrate that the methods proposed in this paper can improve the way the probability densities on [0, 1] are presently estimated.     

Influence analysis in multivariate linear general models

In this paper we obtain several influence measures for the multivariate linear general model through the approach proposed by Muñoz-Pichardo et al. (1995), which is based on the concept of conditional bias. An interesting charasteristic of this approach is that it does not require any distributional hypothesis. Appling the obtained results to the multivariate regression model, we obtain some measures proposed by other authors. Nevertheless, on the results obtained in this paper, we emphasize two aspects. First, they provide a theoretical foundation for measures proposed by other authors for the mul¬tivariate regression model. Second, they can be applied to any linear model that can be formulated as a particular case of the multivariate linear general model. In particular, we carry out an application to the multivariate analysis of covariance.     

The maximum likelihood estimators of the parameters of the gamma distribution are always positively biased

Several authors have conjectured, on the basis of their numerical work, that the maximum likelihood estimators of the shape and scale parameters of the Gamma distribution are positively biased. It is proved that their conjecture is always true.     

二战后澳大利亚种族政策变化的国际根源

二战后澳大利亚种族政策出现的一系列变化有着深刻的国际根源。美国与南非的反种族主义斗争在澳大利亚产生强烈反响,联合国等国际组织不仅直接关注澳大利亚种族问题,而且成为土著活动家争取种族平等的渠道与场所。这一切给澳大利亚联邦政府带来强大的国际压力,成为战后澳大利亚种族政策转变的重要原因。     

美国的中国移民发展特点研究

移民是各国人力资源的重要组成部分。现代移民对宗主国来说已经成为一支不可忽视的建设力量。在美国,中国移民几乎伴随了美国建国后的整个历史时期,为美国的发展建设作出了重大贡献。美国的中国移民发展大致可分为三个阶段:第一阶段,从18世纪80年代到1940年,这一阶段种族歧视占主导地位;第二阶段,从1945年到1960年,涌现出一批重新审视中国移民的美国学者;第三阶段,从20世纪60年代以来,美国政府为扩大高科技人才队伍,修改移民法,使大批华人知识分子涌入美国,为美国的发展建设作出了重大贡献。     

An L1-type estimator of multivariate location and shape

The main goal of the paper is to specify a suitable multivariate multilevel model for polytomous responses with a non-ignorable missing data mechanism in order to determine the factors which influence the way of acquisition of the skills of the graduates and to evaluate the degree programmes on the basis of the adequacy of the skills they give to their graduates. The application is based on data gathered by a telephone survey conducted, about two years after the degree, on the graduates of year 2000 of the University of Florence. A multilevel multinomial logit model for the response of interest is fitted simultaneously with a multilevel logit model for the selection mechanism by means of maximum likelihood with adaptive Gaussian quadrature. In the application the multilevel structure has a crucial role, while selection bias results negligible. The analysis of the empirical Bayes residuals allows to detect some extreme degree programmes to be further inspected.     

反殖民书写与话语陷阱——以两部诺贝尔文学奖得主的小说为中心

小说《野草在歌唱》与《耻》的两位作者相似的种族身份和经历使殖民主义背景下的种族冲突成为共同关注的问题。作为反殖民主义的写作，两部作品在批评和反思殖民主义罪恶的同时未能超越殖民话语的制约，甚至在某种程度上与之形成共谋关系。