In Parts 1 thru 3, we developed a new playmaking metric that is (1) more consistent than assists and (2) better than assists at predicting future assists.
@spamventura had an observation about the results that we'll study a little further in this article. Along the way, we'll give the top 10 PLAYers (capitalization and pun intended) from 2009-10, and how they did in 2010-11.
In Part 2 of this series on a new playmaking metric PLAY, we talked about "altruistic contribution" based on shots. It is basically the difference in shots taken by a player’s teammates (excluding the player’s own shots) when he is on the ice versus off the ice. It’s kind of like a shot-based WOWY that doesn’t include the player's own shots. If a player's teammates take more shots when he is on the ice versus off the ice, his altruistic contribution will be high.
Now we'll use this altruistic contribution to build our playmaking metric PLAY, and show that PLAY is better than assists in two quantifiable ways: (1) it is more consistent than assists, and (2) it is better than assists at predicting future assists.