Using Pomeroy's Predictor to Project a Bracket

This is my first post, so I'll try not to embarass myself.

Last night David sent me a file that can be used to predict games using Ken Pomeroy's ratings. Using this Excel spreadsheet, you can predict the winner of each game, the score, and % of the time that either team will win. There are various uses for this, obviously. What I have done is take Joe Lunardi's current projected bracket (http://sports.espn.go.com/ncb/bracketology) and figure out what percentage of the time each team will advance to each round. As this is fairly time consuming, I have only done the West region (where Kansas currently resides). Here's what I came up with:

Advances to 2nd Rd Sweet 16 Elite 8 Final Four

Wisconsin 98.7% 71.2% 51.6% 22.9%

Central Connecticut 1.2% 0.0% 0.0% 0.0%

Jackson St. 0.1% 0.0% 0.0% 0.0%

Kansas 98.9% 75.5% 52.0% 37.%

East Tennessee St. 1.1% 0.0% 0.0% 0.0%

Georgetown 94.1% 79.6% 34.4% 21.0%

Pennsylvania 5.9% 1.6% 0.1% 0.0%

Air Force 94.7% 56.3% 20.2% 5.3%

Vermont 5.3% 0.5% 0.2% 0.0%

Virginia Tech 75.8% 37.2% 12.3% 2.9%

Santa Clara 24.2% 6.0% 1.1% 0.0%

Virginia 62.8% 13.4% 2.0% 0.5%

Winthrop 37.2% 5.4% 0.5% 0.1%

Southern California 30.6% 4.7% 1.4% 0.5%

Michigan St. 69.4% 19.8% 9.5% 4.9%

Notre Dame 67.6% 22.3% 12.4% 3.5%

Tennessee 32.4% 6.3% 2.1% 0.3%

Obviously, a lot of this depends on the draw, but Kansas will be the favorite to advance in just about any draw they have, as they are #2 in Pomeroy's ratings. What I found interesting was Wisconsin and Kansas reach the Elite 8 almost the exact same percentage of the time, although Kansas is clearly superior when they play head to head. This is a byproduct of Kansas having both Georgetown (Pomeroy #7) and Michigan St. (Pomeroy #11) in their half of the bracket. I would expect that in an average bracket, Kansas would have a greater chance of reaching the Elite 8, but if they were paired with a stronger #1 seed, their chances of winning their Regional Final game would decrease.

I'll probably do another one of these with a future Lunardi bracket, and compare the two.

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