Combining Univariate Tests for Multivariate Location Problem

In this article, three methods of combining dependent univariate tests are studied. The Bahadur approximate efficiencies are derived under the asymptotic normal assumption. These procedures are applied to the multivariate location problem and compared with two Hotelling-type tests. A Monte Carlo study indicates that in certain cases the powers of the combination methods are much better than Hotelling's T ² and other multivariate nonparametric tests.     

Local efficiency of moment estimators in beta-binomial model

In this paper, the beta-binomial model is introduced as a Markov chain. It is shown that the correlated binomial model of Kupper and Haseman (1978) is identical to the additive binomial model of AItham(1978) and both are a first order approximation of the beta-binomial model. For small γ, the local efficiency of the moment estimators for the mean ρ and the extra-binomial variation γ is examined analytically. It is shown that, locally, the moment estimator for p is efficient up to the second order of y. Exact formulae for the relative efficiency are obtained for both the cases with γ known and unknown. Generalization to the unequal sample size case is also carried out. In particular, the gain in efficiency by using the quasi-likelihood estimator instead of the ratio estimator for p is studied when γ is known. These results are in agreement with the Monte Carlo results of Kleinman(1973) and Crowder(1985).     

Robust Likelihood Cross-Validation for Kernel Density Estimation

Likelihood cross-validation for kernel density estimation is known to be sensitive to extreme observations and heavy-tailed distributions. We propose a robust likelihood-based cross-validation method to select bandwidths in multivariate density estimations. We derive this bandwidth selector within the framework of robust maximum likelihood estimation. This method establishes a smooth transition from likelihood cross-validation for nonextreme observations to least squares cross-validation for extreme observations, thereby combining the efficiency of likelihood cross-validation and the robustness of least-squares cross-validation. We also suggest a simple rule to select the transition threshold. We demonstrate the finite sample performance and practical usefulness of the proposed method via Monte Carlo simulations and a real data application on Chinese air pollution.     

个人教育收益率的估计与比较: 一个半参数方法

 本文运用一种变系数部分线性模型扩展了传统的明瑟人力资本收入函数,并提出了对明瑟函数中“平行性”假设的一种检验方法,以分析个人教育收益率如何受到工龄等因素的影响。通过对1991、2000以及2004等年度国家统计局城镇居民收入调查数据的分析,揭示出近二十年来我国城镇居民中不同工龄的人们的教育收益率存在明显区别,其中人教育收益率最高的始终是在1980年代中后期参加工作的群体。对导致我国教育收益率这种特殊现象的原因作了分析。     

试论金代的桑税

金代桑税渊源于辽和北宋的桑税制度.金代在继承辽宋桑税制度的同时,也进一步发展了自己的桑税制度.这表现为:一方面金代两税中的全部税绢都依据桑税征收,从而提高了它在两税中的地位;另一方面金代确立了旨在规定民户最低桑税额的桑地制度.金代桑税并非"户调",而是金代土地税的基本内容,也是金代两税的重要组成部分.     

清代黔东南文斗苗族林业契约补论

针对此前学界认为在锦屏人工林业产权结构中 ,林地的所有制形式是“家族共有制”即“林地家族共同占有 ,而林地上经营的林木归家庭个体所有”的观点 ,笔者以充分的材料论证林业契约是林地“家庭私有制”的产物。文章还论述了文斗和锦屏林地主要在家族内部交易的原因。     

论我国民族地区的跨越式发展

跨越式发展是民族发展的一种形式,也是加快我国民族地区经济文化发展的有效途径。文章结合我国国情,分析了我国民族地区要实现跨越式发展的原因和条件,并提出了具体措施和建议。     

民族文化:广西旅游的灵魂——广西旅游与民族文化的互动研究之一

旅游是文明社会的一种文化活动、一种精神需求。改革开放以后,广西的旅游得到很大发展。但从思想认识上,还有欠缺,理论上还缺乏深入的探讨。在广西要把民族文化引入旅游,丰富旅游的内涵,加强旅游的凝聚力。本文对旅游的本质,广西民族文化的特色和内涵,旅游和民族文化的互动作了论述。     

赫哲族伦理道德初探

赫哲族的伦理道德是赫哲族人民的宝贵精神财富,它在赫哲族人民的精神生活中起着直接的规范性作用。这也表明赫哲族是一个极为讲究伦理道德的民族,其伦理道德既是中华民族传统伦理道德不可分割的组成部分,又具有自身鲜明的特点。赫哲族伦理道德在赫哲族人的生活习俗、民间文学等诸多方面都有十分具体的体现。在社会主义精神文明建设中,对赫哲族伦理道德的特点进行分析,取其精华,弃其糟粕,通过吸收和改造,使赫哲族的传统道德和社会主义道德相统一,是本文研究的主旨。