Economics undergraduate at the University of Tokyo.
I write about defensive play using tracking data — currently PFF FC’s 2022 World Cup data.
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Six Runs and a Blind Spot: Off-Ball Movement Through xMark
What a marking model shows about off-ball runs, and what it misses
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Arriving Isn't Keeping
Splitting pass success into reaching the receiver and keeping the ball
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xMark: Measuring Who Marks Whom
Building a marking model from tracking data, checking it against human analysts, and testing whether getting free brings the ball
