This study examined home country bias in the New England Journal of Medicine (NEJM). Bibliographic information of publications in the NEJM from 2000 to 2019 was collected as data. Bibliometric analyses were performed to investigate the number of papers with one or more US-based authors in the NEJM and compare this to other journals. Citation counts of US-based and non-US papers were calculated and compared. The results show that US-based papers account for 65.44% of the NEJM papers, and the US share of the NEJM papers has remained stable in the examined years whereas in other journals the percentage decreased. More importantly, US-based papers in the NEJM display significantly lower research impact compared with non-US papers. The results suggest that US-based papers are favoured by the NEJM and a home country bias may exist in the publication process of the journal.

中文翻译：

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学术出版中的母国偏见：新英格兰医学杂志的案例研究

这项研究检查了新英格兰医学杂志( NEJM )中的母国偏见。收集了 2000 年至 2019 年NEJM出版物的书目信息作为数据。进行文献计量分析以调查NEJM 中由一位或多位美国作者撰写的论文数量，并将其与其他期刊进行比较。计算并比较了美国和非美国论文的引用计数。结果表明，总部设在美国的论文占65.44的％NEJM的论文，以及美国的份额NEJM论文一直保持稳定在审查年，而在其他期刊的比例下降。更重要的是，NEJM 中的美国论文与非美国论文相比，显示出显着较低的研究影响。结果表明美国的论文受到NEJM 的青睐，并且该期刊的发表过程中可能存在母国偏见。