Opp-adjusted EPA (our DVOA)
Tier 1: open play-by-play derived
- Closed-box gap
- Proprietary efficiency ratings (DVOA-style, opponent-adjusted) are paywalled and their methodology is closed.
- Transparent equivalent
- Solve epa ≈ leagueMean + offense + defense by iterative coordinate descent over open play-by-play, re-centred each pass: a transparent, reproducible opponent adjustment.
- Attribution
- Data from nflverse (https://github.com/nflverse), CC-BY-4.0