Forecasters, professionals and amateurs alike, all got it wrong. The Brexit came as a surprise because the bookmakers (people who organize bets on developments in politics, economics, and sports) reported that about three times more money was put on the event that Britain would stay in the EU than on its alternative. With poll results being inconclusive in the weeks before the referendum, this led many pundits to believe that Britain would stay in the EU.
Also in the United States, the predictors were dramatically embarrassed when Donald Trump pr...