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BGonline.org Forums
cross-check of (nearly) independent models
Posted By: Chuck Bower In Response To: let's make a deal -- OT (Chuck Bower)
Date: Thursday, 10 February 2011, at 12:35 a.m.
It's nice to have an independent cross-check. Analogous to backgammon, there is a football backstep model similar to the construction of bearoff databases:
http://www.footballcommentary.com/twomindrillprobs.htm
Our method is a rollout. We have very little in common with the Krasker model, except some commonality in NFL data (i.e. historical results) which go into the front ends of the models.
Krasker says that (assuming equal, generic NFL opponents) with 2:00 remaining and 1 TO for the offense, a team is 7% worse off with the ball on their own 10-yardline (90 yards from the goalline), trailing by 3 than they are if on the 30-yardline trailing by 6.
Our model agrees with Krasker's in absolute GWC at 0.1% (10-yardline case) and within 0.25% GWC for the 30-yardline case.
Bottom line is that most of the equity for GB going for the TD isn't from their chances to score the TD but rather from leaving PIT with 90 yards to go when the TD attempt fails.
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