A new study by researchers at l’Université de Montréal, suggests that over 50% of academic publishing is controlled by five companies: Reed-Elsevier, Springer, Wiley-Blackwell, Taylor & Francis and Sage. The study suggests that market share of these publishers has grown from 20% in 1973 and 30% in in 1996.

The study was led by the Canada Research Chair on the Transformation of Scholarly Communication, Vincent Larivière.

The full article can be read here.