eminence wrote:Dr Spaceman wrote:laika wrote:
From ESPN. Who knows why all three post different numbers.
Basketball reference and nba.com use different numbers because BBR estimates the number of possessions in a game while nba.com tracks the actual number of possessions. That’s the only difference.
As far as ESPN I will admit that up until now I didn’t even know they had their own version of the stat but I’ve never heard anyone mention it and without any insight into their formula I wouldn’t take their numbers very seriously.
If I remember correctly it's the opposite way around for BBR/NBA
BBR glossary says the following:
Poss
Possessions (available since the 1973-74 season in the NBA); the formula for teams is 0.5 * ((Tm FGA + 0.4 * Tm FTA - 1.07 * (Tm ORB / (Tm ORB + Opp DRB)) * (Tm FGA - Tm FG) + Tm TOV) + (Opp FGA + 0.4 * Opp FTA - 1.07 * (Opp ORB / (Opp ORB + Tm DRB)) * (Opp FGA - Opp FG) + Opp TOV)). This formula estimates possessions based on both the team's statistics and their opponent's statistics, then averages them to provide a more stable estimate.
It’s also something they mention on Dunc’d on a lot. I’m about 80% sure I have it right but can’t find another source online.
EDIT: it would also make sense for nba to have it due to the tracking data they possess.