Monday, September 19, 2011

The Best Laid Plans of Mice and Men

"Who was that? Is that the blind girl? Helen Keller ... I don't know who the fuck Anne Frank is. I'm mad right now. Fuck it. I'm not as swift as I usually am.

-Channing Crowder

OK, I know I’m two weeks late with the final revisions for a model predicting total wins in a season so in fairness to this project I’m going to use the previously posted projects to judge my success.  However, I was excited to discover that by deleting 7 seasons that were acting as outliers I was able to bump the adjusted R2 up to .293 from .19.  If you’ll recall the goal of this project was to get above 56% of my pick correct and I was hoping to accomplish that by having as high of an adjusted R2 as possible.  The observations deleted were all extreme jumps or drops in wins such as the Dolphins 1 win 2007 season or the Patriots 16 win 2007 season.  Below is the new and hopefully better model.

Team
Revised
Lines 9/5
Dolphins
10
7.5
Bills
7
5.5
Patriots
11
11.5
Jets
8
10
Ravens
8
10
Bengals
6
5.5
Browns
9
7
Steelers
5
10.5
Texans
12
9
Colts
11
N/A
Jags
8
6.5
Titans
7
6.5
Broncos
7
6
Chiefs
6
N/A
Raiders
10
6.5
Chargers
13
10
Cardinal
6
7.5
Falcons
8
10
Panthers
4
4.5
Bears
5
8
Cowboys
6
9
Lions
9
8
Packers
8
11.5
Vikings
5
7
Saints
11
10
Giants
9
9
Eagles
11
10.5
49ers
9
7.5
Seahawks
8
6
Rams
3
7.5
Buccanee
5
8
Redskins
4
6

As you can see there are still some goofy predictions.  This model really didn’t like the Steelers or actually the NFC in general.  And based on the first 2 weeks it really seems to over value my Dolphins.  But if my thinking is correct this model should be more accurate in predicting the over/unders for total wins.

Anyways, below is the predictive model I’ll judge my success by.  I’ll keep track of both how the model did and how I would’ve betted.  Keep in mind the Colts and Chiefs would not have been betted on because there was no line.

Division
Prediction
Lines 9/5*
My Bet
AFC East
Dolphins
8
7.5
Under
Bills
6
5.5
Over
Patriots
11
11.5
Under
Jets
10
10
Over
AFC North
Ravens
10
10
Under
Bengals
6
5.5
Over
Browns
6
7
Under
Steelers
9
10.5
Under
AFC South
Texans
11
9
Over
Colts
12
N/A
N/A
Jags
9
6.5
Over
Titans
6
6.5
Under
AFC West
Broncos
6
6
Over
Chiefs
10
N/A
N/A
Raiders
7
6.5
Over
Chargers
12
10
Over
NFC West
49ers
6
7.5
Under
Seahawks
9
6
Over
Rams
4
7.5
Over
Cardinals
8
7.5
Over
NFC South
Falcons
9
10
Under
Panthers
4
4.5
Under
Buccaneers
5
8
Under
Saints
11
10
Under
NFC North
Lions
6
8
Under
Packers
9
11.5
Under
Vikings
5
7
Under
Bears
8
8
Over
NFC East
Giants
9
9
Over
Eagles
11
10.5
Over
Redskins
5
6
Under
Cowboys
6
9
Under



As of week 2, I remain optimistic that me or the model will get above 56% of the bets correct.

In future updates of this model (probably not until summer), I hope to control for multicollinearity among variables, individual years nested within teams, and more extensive outlier analysis.

Finally next week, I hope to unveil weekly predictions of whether teams cover the like or not.  However, this seems like its going to be a particularly intricate model and multiple regression probably won’t cut it.  So if anyone has any experience with multi-level or nested modeling and would like to get on board with this please let me know.

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