predicting the olympic games - kivi · gracenote sports - history. 5 sports services - analytics...
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Predicting the Olympic Games16 January, 2018
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World’s leading entertainment data and technology company
We power the world’s top music services, consumer electronics,
automakers, cable and satellite providers
C O M P A N Y O V E R V I E W
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Music SportsAuto PersonalizationVideo
Gracenote - leveraging the power of metadata
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1995
1998
Awarded 1st
Olympic Games
contract Sydney
2000
2002
Official Service
Provider to
FIFA
2004
Contract with
Reuters
2009
Contract
with
Eurosport
2013
4-year contract
with USOC
2012
Contract with IOC for
Olympics up until
2020
2015
2017
Gracenote Sports - History
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Sports Services - Analytics
Gracenote can dive deep into the numbers to provide business
intelligence for decision making.
Predictive Analysis Talent Identification Results MonitoringBenchmarking
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Gracenote Sports High Performance Customers
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Storytelling
○ “..There are 8 million stories…” in our sports database
○ Analytical tools and statistical models help tell them
Virtual Medal Table (Olympic Sports)
Euro Club Index (Football)
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Prediction
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Projecting Olympic Medals
○ Economic factors
○ Expertise
○Results or other performance data
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Economic factors
○ Needs to include previous Olympic performance
○ Static
○ Provides no information on who might win medals
○ Works poorly for Winter Olympics
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Expertise
○Available only just before the Olympics
○ Static
○Potential for recency bias
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Results
○More information
○Dynamic
○Allocates medals
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Predicting Olympic medals using results data
○Relative Medal Table
○Virtual Medal Table
○Ranking methodology
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Relative Medal Table
○ Result at last World Championships
○ Adjusted for entries at the Olympic Games
○ Popularised by Luciano Barra
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Virtual Medal Table
○Developed in 2010
○Results from events with world class fields
○Weighted by recency & event importance
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Virtual Medal Table application
○Media
○Professional sports organisations
○Anti-doping organisations
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Virtual Medal Table improvements over time
○Home advantage (2014)
○Winning margins (2016)
○ Best 10 results (2016)
○Personal bests (2016)
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Virtual Medal Table issues
○Generic model
○Weighting is subjective
○Probabilties not easy to compute
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Ranking methodologies
○ Elo method as starting point
○Adjustment for multi-competitor
○ Skill sharing across events
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Ranking methodologies
○ Strength of field is calculated from participants
○ Every result can therefore be included
○ Updated every day
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Virtual Medal Table PyeongChang 2018
o Germany number 1
o Followed by Norway and Canada
o Netherlands in top-10
o More medals for Japan than hosts
o 28 countries to win medals
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Netherlands at PyeongChang 2018
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Netherlands at PyeongChang 2018
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The Esmee Visser problem
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Podium Rankings PyeongChang 2018
○Norway now top ahead of Germany
○Korea look more realistic
○U.S.A. perhaps a bit low
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PyeongChang 2018 insights
○ Top of the medal table looks like a fight between Norway & Germany
○Canada, France and U.S.A will round off the top-5 medal winners
○Host nation Korea will gain medals from being at home
○ Laura Dahlmeier (Germany, Biathlon) to win most medals
○Record number of countries to win medals at a Winter Games
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So how good are these methods?
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So how good are these methods?
○More accurate than the economic models
○ Top of ranking more or less same as reality
○At least as good as expert forecasts
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Most predictable winter sports events
○ Figure Skating – Team (89% of medallists correct)
○ Ice Hockey – Women’s Team (85%)
○ Snowboard - Women’s Big Air (83%)
○Cross Country Skiing – Men’s Team Sprint (78%)
○ Speed Skating – Women’s 3000m (78%)
○ Ice Hockey, Figure Skating, Speed Skating, Skeleton all predictable
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Least predictable winter sports events
○Nordic Combined – Men’s Normal Hill/10km (19% of medallists correct)
○Cross Country Skiing – Men’s 50km Classic Style (22%)
○Cross Country Skiing – Men’s Sprint (22%)
○ Speed Skating – Men’s Mass Start (22%)
○Alpine Skiing – Men’s Super G (23%)
○Nordic Combined, Alpine Skiing, Snowboard, Biathlon all unpredictable
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The men’s ice hockey problem
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To summarise
○Results data provides a very good forecast of Olympic medal table
○At individual event level, accuracy still above 50% for medals
○ Sport will always have surprises,
○ Some sports are more unpredictable than others
○Allows post-hoc analysis of under- or over-performance
○ Forecasts an important part of the debate
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Thanks for listening
QUESTIONS?
Twitter: @simongleave (@GracenoteGold)