Wikipedia's article on the causes of the vote in favour of Brexit covers the 2016 referendum, in which 51.8% backed leaving the EU, and the factors behind it: sovereignty, immigration, the economy and anti-establishment politics. Among the research it cites, Michael Ashcroft's poll found 49% of leave voters cited decisions about the UK being taken in the UK, while studies link the vote to demographic change, austerity, lower educational attainment, and pro-Leave newspaper and social-media coverage.