Tuesday, November 23, 2010

Power Rankings (Week 12)

This week I looked at home field advantage.  My metric was pretty simple, from 2004-2009, I summed up all the win ratings for home games, and divided it by all the win ratings from away game.  In the end I have a percentage, the average percentage increase for home games (compared to away games).  I'm not truly measuring the advantage a home stadium provides, but rather, the difference in how well a team plays at home vs. on the road.  For instance, I'm not determining if a team's a good home team or a bad road team.  Anyway, below are the breakdowns (ranked highest to lowest):

Team Home Field Increase
Minnesota Vikings 40.59%
Kansas City Chiefs 39.60%
Houston Texans 37.42%
Arizona Cardinals 35.76%
Baltimore Ravens 29.16%
Tampa Bay Buccaneers 25.09%
Buffalo Bills 23.19%
Chicago Bears 23.17%
Cleveland Browns 19.23%
Seattle Seahawks 18.51%
Washington Redskins 17.62%
Pittsburgh Steelers 16.80%
Dallas Cowboys 16.66%
Detroit Lions 16.30%
San Diego Chargers 15.28%
New Orleans Saints 15.13%
St. Louis Rams 14.84%
Indianapolis Colts 14.65%
Atlanta Falcons 11.94%
Tennessee Titans 11.80%
Denver Broncos 10.81%
San Francisco 49ers 10.35%
New York Jets 8.84%
Green Bay Packers 6.32%
Oakland Raiders 5.53%
New York Giants 4.38%
Jacksonville Jaguars 3.67%
Cincinnati Bengals 3.34%
Miami Dolphins 2.19%
Carolina Panthers 0.63%
Philadelphia Eagles -0.50%
New England Patriots -3.76%

Can't say I'm too surprised by the numbers.  For instance, 3 of the top 5 home field advantages are domes (providing advantageous playing conditions as well as keeping in the noise); and one of the other top 5 home field advantages is that noted Kansas City crowd.  On the other end of the scale, the Eagles and the Patriots actually play better on the road.  Now for these numbers, I only did one regression, that is, I didn't take into account the home / away disparity for the team a team was playing.  For instance, if Minnesota is a noted bad road team, I did not take that into account when they played Green Bay @ Green Bay (I know, sounds a little convoluted, but like my normal power rankings, I would like to incorporate some recursion).  Another odd note, adding a home field advantage component when trying to pick games using my Power Rankings doesn't help; the pure weekly rankings are still the best way to go.  I'll explore the recursion problem in the near future, and see if I can get the prediction a little better.  And, as always, this week's rankings:

Rank Team Power Ranking
1 New York Jets 1.000
2 New England Patriots 0.989
3 Pittsburgh Steelers 0.940
4 Atlanta Falcons 0.936
5 Philadelphia Eagles 0.885
6 Green Bay Packers 0.877
7 Baltimore Ravens 0.860
8 Tennessee Titans 0.810
9 Chicago Bears 0.794
10 Indianapolis Colts 0.765
11 Jacksonville Jaguars 0.763
12 Cleveland Browns 0.751
13 New Orleans Saints 0.733
14 Kansas City Chiefs 0.728
15 Tampa Bay Buccaneers 0.723
16 Miami Dolphins 0.722
17 New York Giants 0.721
18 Seattle Seahawks 0.714
19 Oakland Raiders 0.704
20 San Diego Chargers 0.703
21 Washington Redskins 0.699
22 Houston Texans 0.688
23 St. Louis Rams 0.651
24 Denver Broncos 0.637
25 Minnesota Vikings 0.611
26 Arizona Cardinals 0.596
27 Detroit Lions 0.594
28 San Francisco 49ers 0.576
29 Dallas Cowboys 0.568
30 Buffalo Bills 0.545
31 Cincinnati Bengals 0.510
32 Carolina Panthers 0.441

What's surprising is Cleveland is getting a lot of love, best 3-6 team ever.  Raiders took a dive, and still no love for the Chargers.

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