全球金融危机过后中美两国对中美关系的构想及认识研究

世界金融危机后,随着美国国际地位的下滑和中国国力快速提升,美国对中国的戒心也随之不断增加,在这样的背景下,中美两国间的认识将会发生怎样的变化?对这一议题进行分析对于中美关系的未来展望意义重大。根据中美之间的相互认识与构想来看,中美两国在经济方面维持密切的合作关系,但中国和美国依然就在核心利益方面进行着相互竞争。而且可以预测在未来的国际舞台上,中国将以更积极的姿态,更明确的立场处理中美关系。因此,中国对于核心利益的坚定态度、中美间的矛盾,以及基于相互尊重的对等的中美关系,所有这些都必将让中美间的竞争更加激烈。     

三维激光扫描仪在城市外立面采集成图中的应用

当前我国正进入城市化快速增长时期。如何进行旧城的更新改造和现代化建设,是当今城市化面临的重大课题,传统测绘手段在满足旧城改造设计方面体现诸多不足。本文以Trimble GX地面三维激光扫描仪为测量设备,开展城市外立面采集方面的应用,后期采用天正软件进行城市外立面图的绘制与编辑,分析并总结了采集与后处理过程中问题与误区。     

比较优势、竞争优势与区域一体化

根据新结构经济学理论,遵循比较优势是经济发展成功的“药方”。根据国家竞争优势的“钻石体系”,一个国家发展的产业需要“充分利用当地丰富的资源”“国内有大市场”“国内形成产业集群”“国内是竞争市场”等四个条件才能具有竞争优势。但是,竞争优势的第一个条件其实就是由当地的要素禀赋所决定的比较优势,第三、第四个条件以所发展的产业符合比较优势为前提,而符合比较优势的产业不仅可以有国内市场也可以有国际市场,所以,比钻石理论的第二个条件所强调的市场规模还大。因此,竞争优势的建立离不开比较优势的发挥,按照比较优势发展是竞争优势的基础,只有充分依靠和发挥自己的比较优势才能建立自己的竞争优势。只有充分发挥各个地区的比较优势,通过区域一体化,形成更大的产业集群,这样才能将自身的比较优势更好地转变为在国内国际市场的竞争优势。     

幼儿园开展0-3岁早期教育服务指导的现状调查与分析——以陕西省为例

采用问卷法,面向全省范围内的幼儿园及0-3岁婴幼儿家长进行问卷调研,了解已开展过0-3岁早期教育服务指导的幼儿园基本现状,以及幼儿园对于开展0-3岁早期教育服务指导的总体意愿;了解家长在0-3岁早期教育方面的需求及现状。调查分析发现,幼儿园超半数有开展0-3岁早期教育服务指导工作的意愿;幼儿园受家长认可、最突出的优势是“办园规范,值得信赖”;服务指导最主要形式为亲子活动和托班;政策、师资、资金是所需的主要支持。据此建议应及早出台相关具体政策规范幼儿园开展0-3岁早期教育指导服务,幼儿园也应从师资、形式、内容、场地、时间等方面提升专业性、兼顾灵活性以满足家长需求,幼儿园开展0-3岁早期教育指导服务应在先总结典型经验的基础上逐步推广。     

The Beta Product Distribution with Complex Parameters

The family consisting of the distributions of products of two independent beta variables is extended to include cases where some of the parameters are not positive but negative or complex. This “beta product” distribution is expressible as a Meijer G function. An example (from risk theory) where such a distribution arises is given: an infinite sum of products of independent random variables is shown to have a distribution that is the product convolution of a complex-parameter beta product and an independent exponential. The distribution of the infinite sum is a new explicit solution of the stochastic equation X = (in law) B(X + C). Characterizations of some G distributions are also proved.     

On L 1-consistency of kernel-type density estimator for stationary markov processes

A convergence result for kernel type density estimators, proved by Devroye and Gyrofi (1985), is extended to stationary Markov processess satisfying (G ₂-condition introduced by Rosenblatt (1970).     

Great Expectatrics: Great Papers,Great Journals,Great Econometrics

The article discusses alternative Research Assessment Measures (RAM), with an emphasis on the Thomson Reuters ISI Web of Science database (hereafter ISI). Some analysis and comparisons are also made with data from the SciVerse Scopus database. The various RAM that are calculated annually or updated daily are defined and analyzed, including the classic 2-year impact factor (2YIF), 2YIF without journal self-citations (2YIF*), 5-year impact factor (5YIF), Immediacy (or zero-year impact factor (0YIF)), Impact Factor Inflation (IFI), Self-citation Threshold Approval Rating (STAR), Eigenfactor score, Article Influence, C3PO (Citation Performance Per Paper Online), h-index, Zinfluence, and PI-BETA (Papers Ignored – By Even The Authors). The RAM are analyzed for 10 leading econometrics journals and 4 leading statistics journals. The application to econometrics can be used as a template for other areas in economics, for other scientific disciplines, and as a benchmark for newer journals in a range of disciplines. In addition to evaluating high quality research in leading econometrics journals, the paper also compares econometrics and statistics, alternative RAM, highlights the similarities and differences of the alternative RAM, finds that several RAM capture similar performance characteristics for the leading econometrics and statistics journals, while the new PI-BETA criterion is not highly correlated with any of the other RAM, and hence conveys additional information regarding RAM, highlights major research areas in leading journals in econometrics, and discusses some likely future uses of RAM, and shows that the harmonic mean of 13 RAM provides more robust journal rankings than relying solely on 2YIF.     

The asymptotic equivalence between the iterated improved 2sls estimator and the 3sls estimator

In this paper we show that the 3SLS estimator of a system of equations is asymptotically equivalent to an iterative 2SLS estimator applied to each equation, augmented with the residuals from the other equations. This result is a natural extension of Telser (1964).     

发达经济体与新兴经济体竞争力比较——基于全球竞争力指数视角

在经济全球化的今天,发达经济体与新兴经济体之间的竞争日益激烈.首先,选取30个发达经济体和29个新兴经济体的基本要素指标、效率因素指标和创新因素指标,对发达经济体与新兴经济体竞争力孰强孰弱这一问题进行研究.其次,通过对各指标的计算和比较,得出新兴经济体竞争力仍比较弱的结论.最后,提出新兴经济体要想提升自身竞争力必须从政治制度、宏观经济运行、教育发展、基础设施建设等方面进行改进和完善的政策建议.