Does Open Access Really Increase Impact? A Large-Scale Randomized Analysis

  title={Does Open Access Really Increase Impact? A Large-Scale Randomized Analysis},
  author={Abdelghani Maddi and David Sapinho},
The Open Access Citation Advantage (OACA) has been a major topic of discussion in the literature over the past twenty years. In this paper, we propose a method to constitute a control group to isolate the OACA effect. Thus, we compared citation impact (MNCS) of 2,458,378 publications in fully OA journals to that (weighted MNCS) of a control group of non-OA publications (\#10,310,842). Similarly, we did the same exercise for OA publications in hybrid journals (\#1,024,430) and their control… 

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