中小企业战略信息系统建设探究

阐述了战略信息系统的内涵以及中小企业战略信息系统的建设意义,分析了中小企业战略信息系统建设存在的问题,并针对性地提出了对策。     

分析师利益与投资建议的信息含量

 内容提要:本文分析了证券分析师的利益和我国证券分析师投资建议的信息含量。本文发现，证券分析师投资建议大多为“买入”或“中性”建议，而“卖出”建议却很少。通过对投资建议发布日附近股票超额回报率和超常交易量的研究，本文发现“买入”、“卖出”建议分别会引起股价的永久性上涨和下跌，而“中性”建议不会对股价产生显著影响。此外，被建议“买入”和“卖出”的股票的交易量也会明显地增加，特别是在建议发布的当日。这些现象说明，投资者认为分析师的建议包含了有价值的信息，因而相应地调整了对未来收益的预期以及当前最优的持股数量。股票交易的活跃给证券公司带来了佣金收入，作为对他们向市场传递有价值信息的回报。     

Csiszar’s ϕ-divergences for testing the order in a Markov chain

x ₁, ..., x _n+r can be treated as the sample values of a Markov chain of order r or less (chain in which the dependence extends over r+1 consecutive variables only), and consider the problem of testing the hypothesis H ₀ that a chain of order r− 1 will be sufficient on the basis of the tools given by the Statistical Information Theory: _ϕ-Divergences. More precisely, if p _{a 1 ....., a r}: _{a r +1} denotes the transition probability for a r ^th order Markov chain, the hypothesis to be tested is H ₀:p _{a 1 ....., a r}: _{a r +1} = p _{a 2 ....., a r}: _{a r +1}, a _i ∈{1, ..., s}, i = 1, ..., r + 1 The tests given in this paper, for the first time, will have as a particular case the likelihood ratio test and the test based on the chi-squared statistic. Received: August 3, 1998; revised version: November 25, 1999     

Multivariate Measures of Well-Being and an Analysis of Inequality in the Michigan Data

We demonstrate a multidimensional approach for combining several indicators of well-being, including the traditional money-income indicators. This methodology avoids the difficult and much criticized task of computing imputed incomes for such indicators as net worth and schooling. Inequality in the proposed composite measures is computed using relative inequality indexes that permit simple analysis of both the contribution of each welfare indicator (and its factor components) and within and between components of total inequality when the population is grouped by income levels, age, gender, or any other criteria. The analysis is performed on U.S. data using the Michigan Survey of Income Dynamics.     

网络语言:信息时代的言说方式

随着网络技术的飞速发展 ,网上获取信息、网上交流日益成为一种新的潮流。因此 ,信息时代诞生了属于自己的言说方式。本文试图通过对网络语言的初步考察 ,勾划出这种新兴语言的基本特点 ,并从语言规范化的角度分析指出其存在的问题以及规范的方法等。     

INFORMATION INTERDEPENDENCE: Keohane and Nye's complex interdependence in the information age

A well-known and respected attempt to theorize interdependence in the field of international relations is complex interdependence. In Power and Interdependence , Robert O. Keohane and Joseph S. Nye, Jr define interdependence as reciprocal effects among actors resulting from 'international transactions - flows of money, goods, people and messages across international boundaries'. Though much research has been done on the effects of interdependence on the first three, the flows of messages have been studied less often. Keohane and Nye addressed the issue in a 1998 article in Foreign Affairs , discussing changes in the global environment resulting from the information age which have had an impact on their ideas. This article proposes to go deeper into complex interdependence. The world is becoming increasingly 'information interdependent' and this essay is an attempt to apply the assumptions and concepts presented in complex interdependence to the information age. In the final analysis, complex interdependence complements research from the field of communications, that information flows should be understood as underlying mechanisms and processes that facilitate contextual understanding of issues. It maintains the integrity of the assumptions of complex interdependence, while adding an understanding of the nature of information and information flows.     

阿拉伯国家现代信息技术的发展与挑战

以计算机、互联网和卫星通讯为代表的现代信息技术自20世纪七十年代开始在全球飞速发展。信息全球化正改变着人们以往的生产和生活方式，发达国家凭借信息技术优势优先享有信息全球化带来的诸多裨益，而处于先天弱势的发展中国家如何面对信息不对称竞争已成为所在国文化安全战略的重要考量。同样，阿拉伯国家虽然与发达国家在该领域存在差距，但为了建立符合本国利益的信息化社会，这些国家正加大对信息技术的投入，一些依托自身优势条件发展信息产业的阿拉伯国家已崭露头角。     

关于分割股票市场间信息传递的过程研究

应用结构向量自回归(SVAR)模型对国内外分割市场间的信息传递过程进行了研究,尤其是分析B股的开放和QFII制度的实施对国内市场信息传递过程的影响.研究发现:H股和S&P500指数对A、B股具有显著的收益率溢出效应,反映了国内外市场的融合趋势;QFII制度实施后,A、B股收益率之间的信息传递过程反映了A、B股系统风险的降低;相应地,国内A、B股投机性也在减弱,说明在国外投资者的示范效应下,国内投资者交易理念渐趋成熟,从而进一步反映了国内资本市场的成熟.     

管理信息系统课程的教学探索

管理信息系统是经管类专业的必修课程之一,随着信息技术、计算机和网络技术的快速发展,管理信息系统课程在教学内容和教学方式上要不断地进行更新和优化.根据目前高校实际教学情况,分析了管理信息系统课程教学中存在的诸如教学内容缺乏针对性、教学方法单一、教学过程不注重实践环节等问题,提出了更新教学内容、改进教学方法和优化实践环节的教学改革思路和方案.     

试析狭义批判性思维

狭义批判性思维是对信息试图否定的思维方法,其逻辑机制包括否定、否定的否定、否定与肯定的辨证统一三种情况。批判性思维独具特征,在有效甄别信息、变革思维方式、推动学术创新、塑造创新型人才等方面有着重要的现实意义。