WINNER: An ebullient David Cameron emerges from Parliament on Monday with new Conservative Party MPs after his party won a surprise electoral victory last week that proved pollsters wrong.
WINNER: An ebullient David Cameron emerges from Parliament on Monday with new Conservative Party MPs after his party won a surprise electoral victory last week that proved pollsters wrong. WPA Pool Getty Images
WINNER: An ebullient David Cameron emerges from Parliament on Monday with new Conservative Party MPs after his party won a surprise electoral victory last week that proved pollsters wrong. WPA Pool Getty Images

Op-Ed

May 11, 2015 5:50 PM

Learning from errors of pollsters

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