Due to the devastating impact on victims and society, scholars have started to pay more attention to the phenomenon of mass shootings (MS) in the United States. While the extant literature has given us important insights, disparities in conceptualizations, operationalizations, and methods of identifying and collecting data on these incidents have made it difficult for researchers and audiences to come to a deeper and more comprehensive understanding of the characteristics of offenders, causes and consequences. Using a mixed-method systematic review, this study seeks to assess the state of scholarly research in journal articles regarding MS in the United States. Using SCOPUS as the search database, a total of 73 peer-reviewed journal articles on MS within the United States published between 1999 and 2018 were included in this study. This study finds the number of articles published on MS has increased dramatically between 1999 and 2018. Also, most of the MS studies tend to rely heavily on open-source data using the different definitions of MS. We further examined and discussed theoretical frameworks, methodology, and policy suggestions used in each study. Based on the findings of this study, we suggested implications for future research.

由于对受害者和社会的破坏性影响，学者们开始更加关注美国的大规模枪击现象。现有文献为我们提供了重要的见解，但在概念，操作和识别和收集有关这些事件的数据的方法上存在差异，这使得研究人员和听众难以深入，更全面地了解罪犯的特征，起因和后果。使用混合方法的系统综述，本研究旨在评估美国有关MS的期刊文章的学术研究状况。使用SCOPUS作为搜索数据库，该研究共纳入了1999年至2018年之间在美国发表的关于MS的73篇经同行评审的期刊文章。这项研究发现，在1999年至2018年之间，有关MS的文章数量急剧增加。而且，大多数MS研究倾向于使用MS的不同定义来严重依赖开源数据。我们进一步检查和讨论了每项研究中使用的理论框架，方法论和政策建议。根据这项研究的结果，我们提出了对未来研究的启示。