From Simon Wren-Lewis’s splendid blog:

We are where we are with Brexit not because people were stupid in 2016, but because Brexiters controlled key parts of the means of information. We had Brexit because we had large parts of the press who turned their newspapers into propaganda vehicles for Leave. To believe that almost no one who read these papers were influenced by all this is equivalent to saying advertising does not work at all. What Brexit shows is not that people are stupid but that it is vital who controls the means of information, and the restraints they face from government agencies (which in the UK’s case for the press is pretty much zero).

I am often told that the circulation of newspapers is falling (true) and therefore they no longer have any influence (false). A factor of 2.5 is often used to translate circulation into readership. So even if the combined circulation of the Brexit dailies is 4 million, that means a readership of 10 million (the Leave vote was 17 million). But if you ask people whether they have read a particular newspaper in the past month you get much higher figures: 10 million for the Sun alone, 9 million for the Mail. Electronic readership then multiplies that by a factor of around 3 for those.

Typically thoughtful piece. He omits to take the impact of social media in the Brexit campaign, though. If he had, his argument would have been even stronger.