The oligopoly’s shift to open access publishing

The authors are analysing how for-profit publishers benefit from gold and hybrid article processing charges. This study estimates fees paid for gold and hybrid open access articles in journals published by the oligopoly of academic publishers, which acknowledge funding from the Canadian Tri-Agency. It employs bibliometric methods using data from Web of Science, Unpaywall, open datasets of article processing charges list prices as well as historical fees retrieved via the Internet Archive Wayback Machine, for open access articles published mainstream between 2015 and 2018.