Divot Lab Research
Calibration audits, market efficiency tests, and what we learn trying to find an edge in professional golf — including the findings that went against us.
A six-year calibration audit of DataGolf's prediction model — 292 events, 36,656 player-event records. The model is well-calibrated overall, but it systematically underestimates elite players by 5+ points.
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Measuring DataGolf's edge against Pinnacle's closing line across 284 events. The win market is fully efficient — but the less-liquid top-10 market hasn't caught up to the model.
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Eight sportsbooks, one signal. Recreational books price as accurately as Pinnacle — they just charge roughly double for it. And the "popularity premium" everyone assumes exists runs backwards.
Read the study →Seven seasons of opening and closing prices. The model’s picks shorten before the market closes — every market, every threshold, 48 out of 48 measurements. Whether that edge clears the hold is a different question, and the honest answer is that seven seasons cannot yet separate them.
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