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Should we trust social media sweepstakes on the Tory leadership race?

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So much of political commentary is trying to predict the future. That is one reason I am interested in opinion polls and betting markets. They are different things: pollsters try to capture the state of public opinion at the time, whereas bookmakers put together the predictions of large numbers of people about what is going to happen.

They overlap, because polls are often used to predict how people might vote in future – and they often ask people how they might behave if different things happen. And the evidence is that polls are better at predicting votes than betting markets.........

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