# Who Deserved the 2008-2009 Belgian Football Champion Title? A Semiparametric Answer

## Author

Listed:
• Geenens Gery

(University of Melbourne)

## Abstract

Football (soccer) is certainly the most popular sport in Belgium. In 2008-2009, the Belgian premier league (the so-called Jupiler Pro League) consisted of 18 teams, each having played others twice, home and away. Wins and draws earned 3 points and 1 point, respectively, and teams were first ranked by total points and then by total wins, regardless of the goal difference (or the number of goals scored), unlike in most European leagues. Obviously, the Belgian Champion should have been the team which had ended the season on top of the ranking, but a very unlikely event happened: the first two teams, Sporting Anderlecht and Standard Liege, completed the season with exactly the same number of points (77) and the same number of victories (24). Although the goal difference was in favor of Anderlecht, an extraordinary playoff match was hastily organized to decide the championship, and Standard ended up winning. That dramatic denouement sustained the discussions among the large football-lover part of the Belgian population and opens the interrogation: which team was really the best? The aim of this work is to objectively investigate this question through statistical modelling. Given the results of the whole season, a semiparametric model for the conditional probabilities of home win, tie and away win for each match, given the involved teams and other explanatory variables, is fit. The semiparametric nature of the model grants a great flexibility and allows us to identify interesting and up to now ignored patterns in the above probabilities. Then, a large number of Monte-Carlo simulations are run as if the season was replayed a large number of times, which permits the estimation of absolute probabilities of many events of possible interest. In particular, clear evidence about which team really deserved the 2008-2009 Belgian football champion title appears.

## Suggested Citation

• Geenens Gery, 2010. "Who Deserved the 2008-2009 Belgian Football Champion Title? A Semiparametric Answer," Journal of Quantitative Analysis in Sports, De Gruyter, vol. 6(4), pages 1-31, October.
• Handle: RePEc:bpj:jqsprt:v:6:y:2010:i:4:n:4
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## References listed on IDEAS

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1. Koning, Ruud H. & Koolhaas, Michael & Renes, Gusta & Ridder, Geert, 2003. "A simulation model for football championships," European Journal of Operational Research, Elsevier, vol. 148(2), pages 268-276, July.
2. Klein, Roger W & Spady, Richard H, 1993. "An Efficient Semiparametric Estimator for Binary Response Models," Econometrica, Econometric Society, vol. 61(2), pages 387-421, March.
3. Brillinger David R, 2007. "A Potential Function Approach to the Flow of Play in Soccer," Journal of Quantitative Analysis in Sports, De Gruyter, vol. 3(1), pages 1-21, January.
4. M. J. Maher, 1982. "Modelling association football scores," Statistica Neerlandica, Netherlands Society for Statistics and Operations Research, vol. 36(3), pages 109-118, September.
5. Geenens, Gery & Simar, LĂ©opold, 2010. "Nonparametric tests for conditional independence in two-way contingency tables," Journal of Multivariate Analysis, Elsevier, vol. 101(4), pages 765-788, April.
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## Citations

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Cited by:

1. Geenens, Gery, 2014. "On the decisiveness of a game in a tournament," European Journal of Operational Research, Elsevier, vol. 232(1), pages 156-168.

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