In May 2019, research by the Reuters Institute for the Study of Journalism at the University of Oxford showed that despite the controversies surrounding paywalls, these were on the rise across Europe and the United States. According to the study by Felix Simon and Lucas Graves, more than two-thirds of leading newspapers (69%) across the EU and US were operating some kind of online paywall as of 2019, a trend that has increased since 2017 according to the researchers, with the US seeing an increase from 60% to 76%.[43][44]