Analyzing the Degree of Changes in Indexed Journals: The Case of SJR Database

IF 1.2 Q3 INFORMATION SCIENCE & LIBRARY SCIENCE

PUBLISHING RESEARCH QUARTERLY Pub Date : 2024-07-01 DOI:10.1007/s12109-024-09991-3

Eungi Kim, Madhu Atteraya

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Abstract

The objective of this study was to analyze the degree of changes in indexed journals within a database using SCImago Journal Rank (SJR) as a proxy for Scopus. We downloaded SJR-listed journal data to examine journal evolution over the past decade (2013–2022) and analyzed them in terms of the following metrics: the number of journals, growth rates, normalized growth and the Jaccard index. The findings revealed a significant increase in Scopus-indexed journals during this period, with journals growing from 23,957 in 2013 to 27,033 (12.8 percent) but declining after peaking at 28,099 in 2019. Open access (OA) journals exhibited remarkable growth and higher turnover (48.3 percent) than non-OA journals (2.3 percent). For a thorough assessment of journal growth and overlap, we propose using a quadrant analysis. Using this approach, we found an inverse relationship between the normalized growth rate and the Jaccard index across different subject areas and countries. The methods described in this study can be used to analyze changes in indexed journals in other databases and thus contribute to a better understanding of its indexed journals.

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分析索引期刊的变化程度：以 SJR 数据库为例

本研究旨在使用 SCImago 期刊排名（SJR）作为 Scopus 的替代指标，分析数据库中被收录期刊的变化程度。我们下载了SJR收录期刊的数据，以研究期刊在过去十年（2013-2022年）中的演变情况，并从以下指标对其进行了分析：期刊数量、增长率、归一化增长率和Jaccard指数。研究结果表明，在此期间，Scopus收录期刊数量大幅增加，从2013年的23957种增至27033种（12.8%），但在2019年达到28099种的峰值后有所下降。与非开放存取期刊（2.3%）相比，开放存取（OA）期刊呈现出显著的增长和更高的周转率（48.3%）。为了全面评估期刊的增长和重叠情况，我们建议使用象限分析法。使用这种方法，我们发现不同学科领域和国家的归一化增长率与雅卡德指数之间存在反比关系。本研究介绍的方法可用于分析其他数据库收录期刊的变化，从而有助于更好地了解其收录期刊。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

PUBLISHING RESEARCH QUARTERLY INFORMATION SCIENCE & LIBRARY SCIENCE-

CiteScore

2.20

自引率

22.20%

发文量

期刊介绍： Publishing Research Quarterly is an international forum for the publication of original peer-reviewed papers covering significant research on and analyses of the full range of the publishing environment. The journal provides analysis of content development, production, distribution, and marketing of books, magazines, journals, and online information services in relation to the social, political, economic, and technological conditions that shape the publishing process, extending from editorial decision-making to order processing to print and online delivery. Publishing Research Quarterly publishes significant research reports and analyses of industry trends, covering topics such as product development, marketing, financial aspects, and print and online distribution as well as the relationship between publishing activities and publishing’s constituencies among industry, government, and consumer communities. Scholarly articles, research reports, review papers, essays, surveys, memoirs, statistics, letters, and notes that contribute to knowledge about how different sectors of the publishing industry operate are published as well as book reviews.