The Grey Side of the Green Road : Empirical Assessment of Academic Publishing in the HAL Open Repository

Joachim Schopfel, Eric kergosien, Helene Prost & Florence Thiault
The paper provides empirical results on the part of grey literature in the French national open repository HAL. The results are based on a quantitative analysis of 973,968 deposits from 1,272 research laboratories affiliated the ten most important research universities in France (IDEX program). 35% of all deposits (documents and records) are grey literature. The main types of these items are conference papers (71%), PhD theses (11%) and preprints and working papers (8%). Their overall...
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