http://www.telegraph.co.uk/science/2...wrong-results/
Quote:
Pollsters often struggle to predict a Tory majority in referendums and elections because Conservative voters are busier and far more difficult to get hold of, eminent political scientist John Curtice has said.
Prof Curtice, whose exit polls correctly predicted the 2015 general election when others had failed, admitted that Labour voters were more likely to be at home - rather than out at work or undertaking social engagements - when samplers phoned or called round.
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So there you have it. Tories are busier and more sociable, hence harder to catch at home. Labour voters, on the other hand ...