Canvassing door to door, a time-honoured ritual of any political campaign, is more than it appears. It's a candidate's chance to press the flesh, of course, but increasingly, it is the entry point for data mining, which is how parties collect as much data as they can about you and your voting intentions. Analytics is fast becoming an essential tool in Canadian elections. It means the use of big data to micro-target voters in order to get out the vote, recruit volunteers and dig for donations.

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