Euro 2012 simulating


Why settle for just one realisation of this year’s UEFA Euro when you can let the tournament play out 10,000 times in silico?

The rate parameters in a given match are determined by the relative strength of each team as given by their ELO rating.
The advantage of this approach is that the tournament structure (which teams are assigned to which groups, how points are assigned, quarter final structure, etc) can be accounted for. If we wanted to take this into account when making probabilistic forecasts of tournament outcomes, we would need to calculate many conditional probability statements, following the extremely large number of possible outcomes. However, the downside is that it is only as reliable as the team ratings themselves. I used a weighted average of ELO and FIFA ratings.
After simulating the tournament 10,000 times, the probability of victory for each team is just the number of times that team arose victorious divided by 10,000.
Feel free to get the code here and play around with it yourself. You can use your own rating system and see how the predicted outcomes change. If you are of a certain disposition, you might even find it more fun than the human version of the tournament itself!

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