Cognitive biases might be making you believe Brazil will win the World Cup

As of today, there are 10 teams left in the World Cup, and Brazil is favourite. Never mind that they have won just two of four games so far (in regulation time, not including the match they won on penalties), and conceded goals in three matches (including an embarassing own goal.)

In fact, Brazil’s two wins, one draw, and one win on penalties is equivalent to Costa Rica’s performance. But nobody thinks the Ticos will win.

Here are the odds as presented by Sportsbet.

Sportsbet odds

Germany, who have won all four of their matches, surely look to have better form than Brazil. France too.

Colombia, who have won four matches, scored 11 goals, conceding only two, would appear to be in even better form. The team ranked eight in global soccer at the start of the tournament doesn’t seem to be high on anyone’s list.

So why is everyone backing Brazil?

I propose that a cognitive bias is affecting prediction markets: The availability heuristic. The heuristic is that if people can imagine something clearly they believe it is more likely. The most famous proof for the availability heuristic goes like this:

“In one experiment that occurred before the 1976 U.S. Presidential election, some participants were asked to imagine Gerald Ford winning, while others did the same for a Jimmy Carter victory. Each group subsequently viewed their allocated candidate as significantly more likely to win.”

What’s available to our minds when we think about Brazilian football is scenes like this, from 2002:

brazil 2002

And what comes to mind when we think of Brazil hosting an event is scenes like this:

carnivale crowds

Rio is synonymous with celebration. Can you really call to mind a picture of Rio de Janeiro full of glum Brazilians moping? Neither can I.

The availability heuristic probably means teams like Brazil are over-rated (the same to a lesser extent is likely true of recent World Cup finalists France, Germany and the Netherlands.) So should we let that affect our betting? Probably not.

But there is one exception.

We must acknowledge that referees play an important role in deciding the outcome of Soccer matches. Dodgy penalties come at crucial moments, like the one awarded to the Netherlands to effect their defeat of Mexico.

And referees are just as subject to biases as the rest of us. Research shows they are susceptible to crowd noise, home ground advantages and racial biases.

So if, with scores tied, a Brazilian player sprawls on the turf inside the penalty area in the 90th minute of the World Cup final, the incredible surge of noise inside the Maracana could well blend with the availability bias inside the referees head, and encourage him to point to the penalty spot.

If that happens, the team in green and gold will get to hold the trophy aloft, and all this lofty pontification about controlling predictions for cognitive biases will have been a waste.

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Thomas the Think Engine is the blog of a trained economist. It comes to you from Melbourne Australia.

2 thoughts on “Cognitive biases might be making you believe Brazil will win the World Cup”

  1. As someone with a financial interest in Germany winning this World Cup (a whole $12.50), I am loathe to point out that they’re not the dominating force you make out. But they drew with Ghana.


  2. “Can you really call to mind a picture of Rio de Janeiro full of glum Brazilians moping?”

    Well, I can *now*…

    Is predicting that Brazil would win a World Cup they were hosting really cognitive bias? I’d say it’s a reasonably logical prediction given the home advantage. Host nations tend to do quite well at World Cups–out of the 20 world cups that have been held, 6 have been won by the hosts, and this handy Wikipedia table quite nicely illustrates how well hosts nations do even if they don’t win it (look at how many achieved their best ever result when they hosted):

    I doubt that a Brazil team as poor as this would even have made the semi finals if it had been hosted somewhere else…

    In fact, those Sportsbet odds seem quite rational to me (with the benefit of hindsight). The two finalists are next shortest, after all.


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