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Grainger Graduate Assistant Evidence Synthesis Training

Why it's important to use grey literature

As noted in Bonato (2018), grey literature offers advantages that commercially published items do not for evidence synthesis.

  • Global representation - Commercially published information often has a Northern and Western Hemisphere presumed default. Global representation from the Global South and East are exceptions in commercial publication. Searching grey literature makes information from a variety of locations and cultures available.
  • Emerging technologies and processes - Commercially published literature has a lag time behind the emergence of new technologies and consensus.  Grey literature can emerge more quickly because it doesn't have to wait for a publication cycle.
  • Evidence-based practice - Documents highlighting best practices tend to be published as reports, not as scholarly journal articles (outside of evidence synthesis publications.)
  • Counter publication bias - Including grey literature counteracts the positive bias of commercial publications. Grey literature is more likely to include null or negative outcomes.
  • Not behind a paywall - Researchers have the same access to most kinds of grey literature, regardless of economic or information resources at hand.
  • Diverse perspectives - Grey literature is created in a variety of cultures, institutions, and researchers. For historical minority researchers, grey literature provides an opportunity to overcome gatekeeping that commercial publication institutionalizes.
  • FREE

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