全球智库信息集成服务系统(G2TT): DP8126 The Skewness of Science in 219 Sub-Fields and a Number of Aggregates

G2TT

来源类型	Discussion paper
规范类型	论文
来源ID	DP8126
	DP8126 The Skewness of Science in 219 Sub-Fields and a Number of Aggregates
	Javier Ruiz-Castillo; Ignacio Ortuño-Ortin; Pedro Albarran; Juan A. Crespo
发表日期	2010-11-01
出版年	2010
语种	英语
摘要	This paper studies evidence from Thomson Scientific about the citation process of 3.7 million articles published in the period 1998-2002 in 219 Web of Science categories, or sub-fields. Reference and citation distributions have very different characteristics across sub-fields. However, when analyzed with the Characteristic Scores and Scales technique, which is size and scale independent, the shape of these distributions appear extraordinarily similar. Reference distributions are mildly skewed, but citation distributions with a five-year citation window are highly skewed: the mean is twenty points above the median, while 9-10% of all articles in the upper tail account for about 44% of all citations. The aggregation of sub-fields into disciplines and fields according to several aggregation schemes preserve this feature of citation distributions. On the other hand, for 140 of the 219 sub-fields the existence of a power law cannot be rejected. However, contrary to what is generally believed, at the sub-field level the scaling parameter is above 3.5 most of the time, and power laws are relatively small: on average, they represent 2% of all articles and account for 13.5% of all citations. The results of the aggregation into disciplines and fields reveal that power law algebra is a subtle phenomenon.
主题	Industrial Organization
关键词	Citation analysis Power laws Research performance
URL	https://cepr.org/publications/dp8126
来源智库	Centre for Economic Policy Research (United Kingdom)
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/536948
推荐引用方式 GB/T 7714	Javier Ruiz-Castillo,Ignacio Ortuño-Ortin,Pedro Albarran,et al. DP8126 The Skewness of Science in 219 Sub-Fields and a Number of Aggregates. 2010.