H指数作为科研评价的应用和局限性分析

H指数是美国物理学家乔治.赫什提出的一种旨在衡量科学家个人科研成就的指标。它作为一种科研评价的新指标,在很多领域得到了广泛应用。该文分析了H指数的特征,探讨了H指数在科研评价中的应用情况及其局限性。     

Evaluating Journal Quality: Beyond “Expert” Journal Assessments in the IS Discipline

Assessing the relative stature of journals devoted to the information systems (IS) discipline is an important issue for IS scholars and those who evaluate them. Even though journal assessment results are often dubiously applied by those making hiring, promotion, and merit decisions, the fact that they are so often a major ingredient in these decisions demands that we understand underlying journal assessment processes. Beyond processes involving the opinions of various “experts,” we here examine how IS journals can be evaluated based on overt behaviors of crowds of IS scholars. These behaviors are revealed preferences, in contrast to stated preferences found in opinions. Two classes of objective journal assessments are studied: impact measures and power measures. Among the former, we find that so-called journal impact factors are problematic, rendering their meaningfulness in evaluating journal stature highly suspect. Another kind of impact measure, the H-index, is found to be a more straightforward way to gauge journal impact. Two power measures for assessing IS journal stature are examined: publishing intensity and publishing breadth. The stature of IS journals according to each of the impact measures and power measures is determined. A comparison of the results shows that a small group of four or five IS journals are repeatedly found at the top across multiple objective assessment approaches. To account for both the consumption and production of IS research, it is suggested that a combined use of impact and power measures be employed in exercises aimed at evaluating relative statures of journals devoted to IS research.     

基于H指数的全球企业专利计量分析

通过对美国专利商标局的专利数据,计算不同时间段和技术领域内全球企业的H指数,对全球企业的技术竞争力做出分析和判断.研究发现:分时间段和分领域的的H指数更加有利于判断企业技术竞争力的变迁;国际技术竞争激烈,企业要保持竞争力需要专利数量与质量并重;中国企业与国际差距显著,在H指数、专利数量和专利被引次数方面,中国企业都远落后于发达国家,急需抓住一两个领域先形成一定的竞争优势,然后加以引导和示范,才可能突出重围.     

SCI、ESI、H-index在基础研究评价体系中的功能比较及启示

SCI首要的功能是引文功能,可帮助科技人员获取需要的最新文献、跟踪国际学术前沿、及时了解国际学术动态、构思重大科学问题等提供信息;其次是在引文索引实践中衍生出对科技研究成果评估的功能,主要侧重于SCI论文数量和期刊影响因子。ESI则是在SCI和SSCI基础上,针对22个专业领域,分别对国家、研究机构、期刊、论文以及科学家10年的数据进行统计分析和排序,主要指标包括:论文收录数、论文被引频次、论文篇均被引频次等;ESI的闪光点是对于论文质量的评价。H-index则是指一个人有N篇论文分别被引用了至少N次;它不仅可以用于评估研究人员过去的学术水平,也可以用于预测未来的学术成就。在科研评估实践中,仅以SCI论文数量为考核指标易致短期行为,而ESI和H-index则是一种长效机制。     

我国空调器行业市场集中度的实证分析

行业集中度(CR[,n])和赫芬达尔(H)指数是衡量市场集中度的两个常用指标。利用2000年的统计数据,测算我国空调器行业的市场集中度。实证分析表明,我国空调器行业市场集中度比较低,有待于进一步提高。     

我国证券市场效率进化的实证检验

本文利用中国新兴证券市场1992～2004年的数据,运用R/S分析方法检验发现:无法证明市场的有效程度随着时间推移而提高,我国证券市场的长期记忆效应较弱,市场效率低主要是受短期自相关等因素影响,这可能与市场中存在操纵行为有关;四分位图显示各子市场的有效性排名随着时间而变化,这意味着选取某一特定时段数据对于中国证券市场进行有效性检验的做法具有很大的误导性.