On shrinkage m-estimators of location parameters

For a general class of continuous ( and marginally symmetric ) inultivariate distributions, based on suitable M-statistics ( involving bounded but possibly discontinuous score generating functions), shrinkage estimators of location are considered. These estimators are based on the James-Stein type rule and incorporates the idea of preliminary test estimation too. The main emphasis is laid on the study of asymptotic tdistributional ) risk properties of these est-innators, and asymptotic tin-) adraissibility results are also studied under fairly general regularity conditions.     

论魏晋时期教育的自觉

魏晋时期是继春秋战国之后中国历史上又一个社会大变革的时期。在这一动荡的岁月里,儒家传统的理想完美人格———名实相符、德才兼备、忠孝双全逐渐解体。面对苦难的现实和理想破灭的精神痛苦,魏晋士人对两汉以来的神学化儒学进行了深刻的反思和批判,同时把智慧的触觉伸向了对人的自我存在的价值的探寻。这种探寻赋予了魏晋士人冲决儒家传统伦理道德精神束缚的力量,同时也使他们逐渐走向"自觉"。教育也随之实现了一种历史性的转向:由偏重伦理道德教化功能到以实现人的自由发展为基本价值取向,教育走向了"自觉"。     

On shrinkage least squares estimation in a parallelism problem

In a multi-sample simple regression model, generally, homogeneity of the regression slopes leads to improved estimation of the intercepts. Analogous to the preliminary test estimators, (smooth) shrinkage least squares estimators of Intercepts based on the James-Stein rule on regression slopes are considered. Relative pictures on the (asymptotic) risk of the classical, preliminary test and the shrinkage least squares estimators are also presented. None of the preliminary test and shrinkage least squares estimators may dominate over the other, though each of them fares well relative to the other estimators.     

胡适杂文的艺术初论

本文从解读胡适杂文的文本入手,从文体结构、论证方法、行文造句及文学手法的运用诸方面探讨胡适杂文的表现艺术,指出胡适的杂文有三个突出的艺术特点:其一,结构严密。论证环环紧扣,说理极为有力。其二,清楚明白。一是思想清楚,观点明确;二是语言显浅,明白通俗。其三,议论形象。一是勾勒形象,说理可感;二是善用比喻、富于幽默,全文既通俗浅白,也还生动形象。     

我国人口预期寿命的结构及影响因素研究—基于省级面板数据的分析

基于省级面板数据,本文对预期寿命结构及其影响因素问题进行研究。首先,文章分析了我国整体预期寿命及两性预期寿命的地理分布特性,随时间的变化特点,以及与经济发展水平的关系。然后,建立预期寿命的固定效应模型,分析不同影响因素与预期寿命的关系。研究发现经济发展水平、教育和卫生资源对男性和女性预期寿命会产生不同的影响,其中经济发展水平会显著影响女性预期寿命,而教育对男性预期寿命的影响更显著。由此,经济发展水平的提高会导致两性预期寿命差距的增加,而教育水平的提高和卫生资源投入的增加则可能会降低两性预期寿命的差距。     

中国利率调整对消费作用的实证分析

研究表明,中国利率的变化与国民消费水平增长呈现出一种反向变化的趋势,这一结果与传统的凯恩斯理论、永久性收入假说理论和随机游走理论等相悖,其主要原因是中国的城市消费和农村消费的异质性和“二元结构”特点,不具备上述理论的假设条件。利率机制目前还不是中国调解消费的理想工具,应考虑更多地使用非利率的其他金融手段。     

Asymptotic equivalence of the harrell-davis median estimator and the sample median

This paper presents an asymptotic equivalence result with a sharp rate of convergence forthe sample median and the Harrell-Davis median estimator. The consequences of this result are discussed.