Embargo (academic publishing)

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For Academic policies regarding a silent period before publication, see News embargo#On articles in scientific journals.

In academic publishing, an embargo is a period during which access to academic journals is not allowed to users who have not paid for access (or have access through their institution). The purpose of this is to protect the revenue of the publisher,[1] although there is no evidence to date that shows that shorter or no embargo periods harm publishers.[2]

Various types exist:

  • A 'moving wall' is a fixed period of months or years.
  • A fixed date is a particular time point that does not change.
  • A current year (or other period) is setting a time point on Jan. 1 of the current year, so that all material earlier than that is available. Although fixed during the year, it will change each year.


There are various purposes:

  • For delayed open access journals, the embargo separates the most recent period, for which a subscription is needed, from an older period, where a subscription is not needed and anyone may access the article. This can range from a few months to several years.[3]
  • For self-archiving, the embargo is a period of time set by the publisher in the copyright transfer agreement where access to the archived version of the article in a digital repository is restricted until the embargo period expires. Typical embargo periods range from 6 to 24 months, though some publishers may require an embargo of up to 48 months.[4]
  • In full-text databases, such as those of EBSCO Publishing or ProQuest, it separates the most recent period, where only a title or abstract is available, from an older one, which is openly accessible.[5]

Moving wall[edit]

In academic publishing, a moving wall is the time period between the last issue of an academic journal available in a given online database and the most recently published print issue of a journal. It is specified by publishers in their license agreements with databases (like JSTOR), and generally ranges from several months to several years.[6]


  1. ^ "Publication embargo « SPARC Europe". sparceurope.org. Retrieved 2015-10-19. 
  2. ^ "The evidence fails to justify publishers' demand for longer embargo periods on publicly-funded research.". Impact of Social Sciences. Retrieved 2015-10-19. 
  3. ^ Laasko, Mikael; Björk, Bo-Christer (2012). "Delayed Open Access – an overlooked high-impact category of openly available scientific literature" (PDF). Journal of the American Society for Information Science and Technology (Article pre-print ed.). Retrieved 2015-10-19. 
  4. ^ "SHERPA/RoMEO - Publisher copyright policies & self-archiving". www.sherpa.ac.uk. Retrieved 2015-10-19. 
  5. ^ "EBSCO Support: What are Publication Embargoes?". support.ebscohost.com. Retrieved 2015-10-19. 
  6. ^ "What is a moving wall?". JSTOR. Retrieved 19 October 2015.