Method of Moments Estimation in Linear Regression with Errors in both Variables

Recently, in this journal, there has been revised attention on estimating the parameters of the errors in variables, linear structural model. For example, O’Driscoll and Ramirez (2011) used a geometric approach to give insight into the performance of various slope estimators for the linear structural model as introduced by the present author. This article aims to provide a unified method of moments approach for estimating the parameters in the linear structural model, concentrating attention on estimators using the higher moments, which to date has received only little attention in the literature.     

多方法改进视角下的中国核心通货膨胀测算和效果评价

本文在探析核心通货膨胀测算方法和评价方法原理的基础上,结合中国价格变动特点对部分方法进行适当改进,并将其应用于中国2001-2013年核心通货膨胀测算,然后采用无偏性检验、相关性检验、趋势追踪能力检验、未来预测能力检验四种准则对所有测算结果的货币政策应用效果做出评价。结果发现,没有任何一种方法是绝对最优的,相对而言,SVAR法、指数平滑法、不对称截尾平均法的效果较为优良。这一结论对中国的货币政策执行和核心通货膨胀测算方法研究具有重要的启示意义。     

Bayes Hilbert Spaces

A Bayes linear space is a linear space of equivalence classes of proportional σ‐finite measures, including probability measures. Measures are identified with their density functions. Addition is given by Bayes' rule and substraction by Radon–Nikodym derivatives. The present contribution shows the subspace of square‐log‐integrable densities to be a Hilbert space, which can include probability and infinite measures, measures on the whole real line or discrete measures. It extends the ideas from the Hilbert space of densities on a finite support towards Hilbert spaces on general measure spaces. It is also a generalisation of the Euclidean structure of the simplex, the sample space of random compositions. In this framework, basic notions of mathematical statistics get a simple algebraic interpretation. A key tool is the centred‐log‐ratio transformation, a generalization of that used in compositional data analysis, which maps the Hilbert space of measures into a subspace of square‐integrable functions. As a consequence of this structure, distances between densities, orthonormal bases, and Fourier series representing measures become available. As an application, Fourier series of normal distributions and distances between them are derived, and an example related to grain size distributions is presented. The geometry of the sample space of random compositions, known as Aitchison geometry of the simplex, is obtained as a particular case of the Hilbert space when the measures have discrete and finite support.     

Estimating the probability of obtaining nonfeasible parameter estimates of the generalized pareto distribution

In this paper we consider the problem of estimating the parameters of the generalized Pareto distribution. Both the method of moments and probability-weighted moments do not guarantee that their respective estimates will be consistent with the observed data. We present simple programs to predict the probability of obtaining such nonfeasible estimates. Our estimation techniques are based on results from intensive simulations and the successful modelling of the lower tail of the distribution of the upper bound of the support. More simulations are performed to validate the new procedure.     

基于灰色关联分析法的农业信息化发展研究——以河南省为例

通过构建农业信息化指标评价体系,运用灰色关联分析法建立指标分析模型进行实证分析,由关联度排序来衡量各指标对农业信息化发展的影响和作用,最终根据分析结果提出相应的对策和建议来加快河南省农业信息化的发展.     

经济发展方式转变背景下的大学生创业与创新创业教育

通过对大学生就业难这一现象进行分析,笔者认为社会对知识不能充分利用的原因在于"资源驱动"的经济发展方式,进一步指出经济发展方式转变的方向是"创新驱动"。同时,利用知识经济学原理对"创新驱动"的组织机制进行了探析,论证了这个机制是知识劳动者在技术性知识和制度性知识创新基础上开展的"知识型创业"并论证了"知识型创业"和创新创业教育的关系。     

论科学发展观对高校党建工作的指导作用

科学发展观对高校党建工作具有重要指导作用。高校党的建设必须坚持以“发展”为诉求目标;以“以人为本”为着眼点;以“全面协调可持续”为基本要求;以“统筹兼顾”为根本方法。     

提升沿海地区城市竞争力的研究——以江苏省盐城市为例

选取12大类,44项指标,运用R型因子分析法对江苏省13个城市的经济竞争力、社会竞争力、人居环境竞争力进行计算,在此基础上得出各城市的综合竞争力。统计结果表明：盐城市的各项竞争力指数均在75以下,位于第三等级,与苏中、苏南各市差距明显。对如何提升盐城综合竞争力进行了思考,并提出东扩南融的发展思路。     

问题解决法在“电路CAD”课程教学中的应用

＂电路CAD＂是一门实践性很强的课程,授课老师应以如何提高学生的学习兴趣与学习效果为教学目标。问题解决法是指在教学过程中以＂围绕实践、重在应用＂为原则,引导学生带着问题去学习的启发式教学方法,该教学方法可以激发学生联系实际中有趣的现象,理解所学知识间的内在联系,探索问题的解决方案。通过问题解决法在＂电路CAD＂教学中的应用,调动了学生的学习积极性,优化了课堂教学,提高了教学效果,是一种适合在＂电路CAD＂教学中使用的方法。