After several months of learning the concept of survival analysis and applying it to hockey, I published my article, “Quantifying Differences between the Regular Season and Playoffs using Survival Analysis”. Among the readers, one noteworthy individual in the sports analytics community commented on Twitter:
His tweet motivated this brief analysis to answer the first question: “Can I repeat my previous analysis for regular season by period?”. First, I only look at regular season data and change the treatment variable from whether the game is played during the regular season or playoffs to whether it was played in Period X vs Period Y. Then, I approach Tom’s question in a different way by keeping the treatment variable as regular season vs playoffs, but filter for the 1st, 2nd, and 3rd periods. This further shows the discrepancy in change in rates of events by period.