Saturday, December 05, 2009

World Cup Rating Systems Compared

First, let me be the millionth person to say what an amazing draw for the USA. It's about as good as we could've hoped, and for the first time actually we're a favorite to advance. What exactly are the odds of us advancing after this lucky draw? Well, it depends on who you ask. It seems like everybody has a national team rating system these days, so let's take a look at how each of them rate our chances.

Indeed, Voros McCracken, Soccer Power Index (Nate Silver), and the Castrol FIFA World Cup Predictor all have the USA as the second best team in the group. However, the odds for advancement differ (64%, 48%, 73% respectively). In addition, we're also favored to advance if you use the FIFA rankings or the ELO ratings.

Here are the odds for every team using each of the three projections:


Odds for Advancement


Voros SPI Castrol
France 69.1% 60.0% 59.0%
Uruguay 54.8% 62.0% 61.5%
Mexico 56.6% 40.0% 49.5%
South Africa 19.5% 38.0% 30.0%




Argentina 79.4% 77.0% 79.1%
Nigeria 40.6% 58.0% 47.3%
Greece 46.0% 36.0% 46.1%
South Korea 34.1% 29.0% 27.6%




England 89.7% 82.0% 90.2%
USA 64.4% 48.0% 73.0%
Slovenia 30.2% 35.0% 21.0%
Algeria 15.7% 35.0% 15.9%




Germany 76.3% 65.0% 74.4%
Serbia 51.2% 49.0% 47.9%
Australia 45.9% 41.0% 48.2%
Ghana 26.6% 45.0% 29.5%




Netherlands 79.3% 72.0% 79.8%
Denmark 49.9% 40.0% 49.5%
Cameroon 33.6% 63.0% 32.3%
Japan 37.3% 25.0% 38.5%




Italy 83.6% 83.0% 84.3%
Paraguay 67.8% 78.0% 73.3%
Slovakia 43.9% 32.0% 38.8%
New Zealand 4.8% 8.0% 3.6%




Brazil 90.8% 84.0% 91.7%
Portugal 58.7% 55.0% 52.4%
Côte d'Ivoire 45.3% 57.0% 50.5%
North Korea 5.2% 4.0% 5.4%




Spain 88.0% 84.0% 88.1%
Chile 44.2% 57.0% 40.2%
Switzerland 38.2% 29.0% 36.9%
Honduras 29.7% 30.0% 34.7%

The teams each one have advancing that the others don't:

Voros Greece, Mexico
SPI Cameroon, Côte d'Ivoire
Castrol Australia

I noticed one of the things SPI does is factor in a World Cup continent home field advantage, so that's why it has African teams higher.

Here's a chart of who each thinks will advance without percentages, including FIFA and ELO as well (using the higher ranked teams):


Advancement Chart


Voros SPI Castrol FIFA ELO
France yes yes yes yes yes
Uruguay
yes yes

Mexico yes

yes yes
South Africa










Argentina yes yes yes yes yes
Nigeria
yes yes

Greece yes

yes yes
South Korea










England yes yes yes yes yes
USA yes yes yes yes yes
Slovenia




Algeria










Germany yes yes yes yes yes
Serbia yes yes
yes yes
Australia

yes

Ghana










Netherlands yes yes yes yes yes
Denmark yes
yes
yes (tie)
Cameroon
yes
yes
Japan



yes (tie)






Italy yes yes yes yes yes
Paraguay yes yes yes yes yes
Slovakia




New Zealand










Brazil yes yes yes yes yes
Portugal yes
yes yes yes
Côte d'Ivoire
yes


North Korea










Spain yes yes yes yes yes
Chile yes yes yes yes yes
Switzerland




Honduras






Voros and Castrol also have odds for winning the entire tournament. I didn't see that for SPI (yet).

Odds for Winning


Voros Castrol
Algeria 0.0% 0.0%
Argentina 6.6% 7.5%
Australia 1.0% 1.3%
Brazil 23.9% 23.6%
Cameroon 0.6% 0.4%
Chile 0.7% 0.5%
Côte d'Ivoire 1.1% 1.5%
Denmark 1.6% 1.5%
England 9.9% 10.4%
France 5.0% 2.6%
Germany 5.7% 5.8%
Ghana 0.1% 0.2%
Greece 0.7% 0.8%
Honduras 0.3% 0.3%
Italy 3.9% 3.6%
Japan 0.7% 0.7%
Mexico 2.0% 1.3%
Netherlands 10.7% 10.1%
New Zealand 0.0% 0.0%
Nigeria 0.6% 1.1%
North Korea 0.0% 0.0%
Paraguay 1.5% 1.5%
Portugal 3.5% 1.8%
Serbia 1.3% 1.1%
Slovakia 0.1% 0.1%
Slovenia 0.1% 0.0%
South Africa 0.1% 0.3%
South Korea 0.3% 0.2%
Spain 14.4% 16.1%
Switzerland 0.5% 0.4%
Uruguay 1.9% 2.7%
USA 1.2% 2.4%

Only four teams differ by more than one percentage point. Voros has France and Portugal higher, while Castrol has Spain and the USA higher.

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