Weighted Estimator for the Linear Transformation Models with Multivariate Failure Time Data

In this article, a simple and efficient weighted method is proposed to improve the estimation efficiency for the linear transformation models with multivariate failure time data. Asymptotic properties of the estimators with a closed-form variance-covariance matrix are established. In addition, a goodness-of-fit test is developed to evaluate the adequacy of the model. The performance of proposed method and the comparison on the efficiency between the proposed method and the working independence method (Lu, 2005) are conducted in finite-sample situation by simulation studies. Finally a real data set from the Busselton Population Health Surveys is illustrated to validate the proposed methodology. The related proofs of the theorems are given in the Appendix.     

An objective Bayesian analysis of the two-parameter half-logistic distribution based on progressively type-II censored samples

This paper develops an objective Bayesian analysis method for estimating unknown parameters of the half-logistic distribution when a sample is available from the progressively Type-II censoring scheme. Noninformative priors such as Jeffreys and reference priors are derived. In addition, derived priors are checked to determine whether they satisfy probability-matching criteria. The Metropolis–Hasting algorithm is applied to generate Markov chain Monte Carlo samples from these posterior density functions because marginal posterior density functions of each parameter cannot be expressed in an explicit form. Monte Carlo simulations are conducted to investigate frequentist properties of estimated models under noninformative priors. For illustration purposes, a real data set is presented, and the quality of models under noninformative priors is evaluated through posterior predictive checking.     

网络出版时代编辑需要强化的几种意识

随着网络技术的迅速发展,出版行业正在经历着一场变革。在网络出版环境下,编辑工作如何开展才能适应这一新兴出版模式,是当前出版行业和学术界所关注的话题。从实际工作出发,概述了网络出版时代编辑急需强化的版权意识、内容把关意识、全程策划意识以及交互意识,并阐述了加强上述意识的必要性和紧迫性。     

汉语主动、被动简单句中的量词辖域释义

文章对汉语简单句结构中处于主语与宾语位置的量化名词词组间的交互关系具有歧义的现象,特别是主动、被动结构中辖域释义的不对称现象作了初步探讨,指出管约框架下的量词提升规则和辖域原则都不能对其做出圆满解释;而以最简方案的特征核查子理论为依据的辖域原则,依然无法解释汉语量词辖域的全部问题。文章建议在应用辖域原则的同时,考虑汉语主动、被动结构中语义因素的限制作用,在逻辑表达式中,把“都”和主题化特征处理为功能语类,把“被”处理为轻动词,则汉语主动、被动简单句中的量词辖域的不一致现象可以得到较为合理的解释。     

关于英语被动结构的句法分析

格理论和扩充的投射理论EPP不能对被动结构的推导动因做出完全解释;被动结构的形成与及物动词在句法层面的被动化有关;在Chomsky(1995)最简方案的框架内,运用VP嵌套理论能够对被动句式做出合理的句法解释:NP的前移是为了满足对T的强D特征核查的要求。     

关于高校绩效工资总额核定方法的思考

我国第四次分配制度改革正在进行中,工资构成中的绩效工资将承担规范分配秩序和搞活高校内部分配机制的双重职能,其总额核定的是否科学合理,将直接影响到本次分配制度改革预期目标的实现程度,作者从绩效工资总额内涵、理论基础、核定原则、核定方法等方面进行了综合研究。     

晚清政治发展之政治阻滞因素分析

政治发展是一种正向的政治变迁,晚清中国社会曾出现过一个艰难的后发外源性政治发展的实践过程,历经洋务运动、戊戌维新变法运动和清末新政立宪运动,但由于当时中国特殊的社会形态、统治集团陈旧而狭隘的统治意识和统治心态、及国内政局动荡失控等政治阻滞因素影响而失败。研究总结这一历史实践可以使我们更好地把握历史,更可为当代中国政治发展实践提供借鉴。     

几种语言的WH部分移位特征推导

德语、波兰语等语言wh成分部分移位问句发生wh特征移位,其带有i[Q]和u[wh]*特征的标句中心词C与带有i[wh]和u[Q]特征的wh成分进行多重一致关系特征核查使后者处于低于句首辖域位置的Spec-CP位置.匈牙利语、阿尔巴尼亚语等语言wh成分部分移位问句进行焦点特征移位,其带有i[Q]和u[Fbc]*特征的焦点中心词F与带有i[Foc]和u[Q]特征的wh成分进行Foc特征一致关系核查并使后者前移置于CP之后的Spec-FP位置.     

一致关系下英语Tough句的生成与推导

遵循Chomsky最简方案新框架精神并基于Hicks关于空算子的假定,设定英语Tough句包含一个附带DP成分的空算子结构,空算子带有格和WH特征,内嵌DP成分带有格特征。通过一致关系特征核查,Tough句中的非解释性特征一一删除。借助空算子的搭桥作用,与Tough句相似的特性形容词空算子结构的生成也得到了解释。     

Automatic Specification Testing for Vector Autoregressions and Multivariate Nonlinear Time Series Models

This article introduces an automatic test for the correct specification of a vector autoregression (VAR) model. The proposed test statistic is a Portmanteau statistic with an automatic selection of the order of the residual serial correlation tested. The test presents several attractive characteristics: simplicity, robustness, and high power in finite samples. The test is simple to implement since the researcher does not need to specify the order of the autocorrelation tested and the proposed critical values are simple to approximate, without resorting to bootstrap procedures. In addition, the test is robust to the presence of conditional heteroscedasticity of unknown form and accounts for estimation uncertainty without requiring the computation of large-dimensional inverses of near-to-singularity covariance matrices. The basic methodology is extended to general nonlinear multivariate time series models. Simulations show that the proposed test presents higher power than the existing ones for models commonly employed in empirical macroeconomics and empirical finance. Finally, the test is applied to the classical bivariate VAR model for GNP (gross national product) and unemployment of Blanchard and Quah (1989 Blanchard, O. and Quah, D. 1989. “The Dynamic Effects of Aggregate Demand and Supply Disturbances,”. The American Economic Review, 79: 655–673. [Web of Science ®] , [Google Scholar]) and Evans (1989 Evans, G. W. 1989. “Output and Unemployment Dynamics in the United States: 1950–1985,”. Journal of Applied Econometrics, 4: 213–238. [Crossref], [Web of Science ®] , [Google Scholar]). Online supplementary material includes proofs and additional details.