Two interesting papers (study/research) about digital journalism and the publishing business from Reuters.
Their 2017 predictions, now that we are coming close to 2018, are worth a read and most of them are accurate - they predicted the most important topics correctly, although, as always, trends need more time than expected to really become mainstream. But if you're working in or you're interested in digital pubishing, this one is worth a read:
Full PDF: http://reutersinstitute.politics.ox.ac.uk/sites/default/files/2017-04/Journalism%2C%20Media%20and%20Technology%20Trends%20and%20Predictions%202017.pdf
A great resource for statistics, numbers and data is the 2017 digital news report with country by country numbers from Europe, Americas and Asia/Pacific