eyriq wrote:Do you agree with this framing?
Here’s a breakdown of variance in NBA wins and the percentage explained:
Talent & Fit — 50%
Health & Availability — 12%
Shooting Variance & Luck — 12%
Schedule & Rest/Travel Context — 8%
Coaching & Tactics — 7%
Effort & Execution Intensity — 6%
Home-Court & Arena Effects — 3%
Officiating Variance — 2%
If that’s the model, then the debate over effort boils down to whether the swing is closer to zero or closer to six percentage points.
My percentages summed to 100 %
Talent and fit — 58%
Health and availability — 18%
Shooting variance and luck — 9%
Coaching and tactics — 6%
Schedule and rest/travel — 5%
Home court and arena — 2%
Effort and execution intensity — 1%
Officiating variance — 1%
Why the shifts:
Talent is a bit underweighted in your list. Once you fold in that talent drives shot quality, defence without fouling, and scheme ceiling, it needs to be the majority.
Health is bigger: injuries move rotations and staggered minutes in ways that compound.
Shooting variance still matters but a chunk of what looks like “luck” is actually talent driven (shot quality, shooter quality), so I trim it.
Coaching lands near 5–7 for season long effects; larger spikes show up in series or short windows.
Effort regresses over 82 and is mostly mediated by talent, culture, and health — it is not six points at season scale.
What that means in wins (think “share of explainable variance,” not additive wins)
Rule of thumb: 1 percentage point ≈ 0.82 wins over 82.
Talent and fit ≈ 48 wins worth of the explainable pie
Health and availability ≈ 15 wins
Shooting variance and luck ≈ 7–8 wins
Coaching and tactics ≈ 5 wins
Schedule and rest/travel ≈ 4 wins
Home court and arena ≈ 1–2 wins
Effort and execution ≈ ~1 win
Officiating variance ≈ ~1 win
Practical swings you actually see in a season
Health: typical swing 3–8 wins, outliers bigger.
Shooting variance: 2–5 wins.
Coaching/tactics: 1–3 wins season long.
Schedule: 1–3 wins depending on back to backs, travel, and timing luck.
Effort: usually 0–2 wins once you average out.
Home-court officiating: each 0–1 win net over a season.
A bottom line on “effort”
If the question is whether effort is near zero or near six percentage points, the real answer is much closer to zero at season scale — about one percent on average, occasionally nudging two when culture collapses or surges.
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