> For the complete documentation index, see [llms.txt](https://docs.unsub.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.unsub.org/troubleshooting/where-does-the-citation-and-authorship-data-come-from.md). # Where does the citation and authorship data come from? Citation and authorship data come from [OpenAlex](https://openalex.org/). There are a few different sources of this kind of data. OpenAlex is superior to the alternatives, and here's why. We think coverage is the most important factor when considering the Unsub use case. According to Harzing (2016) Coverage of MAG (and therefore OpenAlex as it's built on MAG) is better than WoS and at least as good as Scopus. Visser et al. (2020) found that MAG had the highest overall coverage of the set: MAG, WoS, Scopus, Dimensions and Crossref. References: Harzing, A.-W. (2016). Microsoft Academic (Search): a Phoenix arisen from the ashes? Scientometrics, 108(3), 1637–1647. Visser, M., van Eck, N. J., & Waltman, L. (2020). *Large*-*scale comparison of bibliographic data sources: Scopus, Web of Science, Dimensions, Crossref, and Microsoft Academic*. ### What years are included in calculating the citations and authorships data in the single journal view popup? As of right now (August 2022) the years we are pulling from to get citations and authorships data are: 2014-2022 ### How does Unsub model authorships and citations? It’s a linear extrapolation of current data. That is, if there’s 10 authorships in the Journal of Current Chemistry in the last year of data we have, then each future year we’d forecast 10 authorships. Citations works the same way. ### How often is authorship and citation data updated? We'll have more details here soon regarding update frequency. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.unsub.org/troubleshooting/where-does-the-citation-and-authorship-data-come-from.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.