US presidential election predictions - no contest
Posted by: Jan-Erik Nordoen on 05 November 2012
The extract below is from the New Scientist article "The US presidential election is no contest". The PredictWise site puts Obama's likelihood of victory at 71.8 % and Romney's at 28 %, while over at FiveThirtyEight, it's even more in Obama's favour : 86.3 to 13.7 %.
FROM tabloids and broadsheets to left-leaning blogs and conservative talk shows, the US media has been united on one point in recent months: the presidential election is too tight to call. The difference between the candidates is "razor thin", The New York Post said recently. The "race remains close", agreed The Washington Post. According to The New York Times it is "widely expected to rest on a final blitz of advertising and furious campaigning".
But it takes just a few clicks to go from that last article to one that tells a very different story - one much more in keeping with what science tells us about the election. The New York Times hosts FiveThirtyEight, a blog by statistician Nate Silver dedicated to crunching electoral numbers. It gives the Republican challenger Mitt Romney a 1-in-4 chance of victory. Over at PredictWise, another source of political forecasts, Romney's odds are only a shade better. The race isn't close or razor-thin or dependent on advertising. It is President Obama's to lose - something that readers are rarely told.
Why the discrepancy? To answer that question, think about what polls actually are. They are often taken as an indication of who will win the election. But polls only provide a snapshot, often with a large margin of error, of who would win if the election took place today. That's very different from what we really care about, which is the candidate most likely to win the real thing in November. That's a forecast. It's what FiveThirtyEight and PredictWise provide, and it's a more complex beast than a poll.
Full article here :
http://www.newscientist.com/ar...n-is-no-contest.html