|Cost||Mostly fee-free (monetarily gratis)|
|Disciplines||Social sciences, engineering sciences, humanities, life sciences, applied sciences, health and physical sciences|
|Record depth||Index, abstract & full-text|
The SSRN, formerly known as Social Science Research Network, is a repository for preprints devoted to the rapid dissemination of scholarly research in the social sciences and humanities and more. Elsevier bought SSRN from Social Science Electronic Publishing Inc. in May 2016.
In January 2013, SSRN was ranked the biggest open-access repository in the world by Ranking Web of Repositories (an initiative of the Cybermetrics Lab, a research group belonging to the Spanish National Research Council), measured by number of PDF files, backlinks and Google Scholar results.
In May 2016, SSRN was bought from Social Science Electronic Publishing Inc. by Elsevier. On 17 May 2016, the SSRN founder and chairman Michael C. Jensen wrote a letter to the SSRN community in which he cited SSRN CEO Gregg Gordon's post on the Elsevier Connect and the "new opportunities" coming from the fusion, such as a broader global network and the freedom "to upload and download papers" (with more data, more resources, as well as new management tools). While predicting "some conflicts" on the interests alignment of the former competitors, he defined them as "surmountable".
In July 2016 there were reports of papers being removed from SSRN without notice; revision comments from SSRN indicated this was due to copyright concerns. Gordon characterized the issue as a mistake affecting about 20 papers.
Academic papers in Portable Document Format can be uploaded directly to the SSRN site by authors and are then available around the world via download. Users can also subscribe to abstracting emails covering a broad range of research areas and topic specialties. These distributing emails contain abstracts (with links to the full text where applicable) of papers recently submitted to SSRN in the respective field.
SSRN, like other preprint services, circulates publications throughout the scholarly community at an early stage, permitting the author to incorporate comments into the final version of the paper before its publication in a journal. Moreover, even if access to the published paper is restricted, access to the original working paper remains open through SSRN, so long as the author decides to keep the paper up. Often authors take papers down at the request of publishers, particularly if they are published by commercial or university presses that depend on payment for paper copies or online access.
Academic papers in PDF can be uploaded directly to the SSRN site by authors and may then be available for downloading. As of 2019, download by users is generally subject to registration or completion of a ReCAPTCHA challenge and therefore SSRN is not considered by some to be a suitable open access location, unlike open archives like most institutional repositories.
Publishers and institutions can upload papers and charge a fee for readers to download them.
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