Friday, October 24, 2014

S-Curve PRESEASON

The 1 line: Kansas, Wisconsin, Duke, Arizona
The 2 line: Kentucky, Wichita St, North Carolina, Michigan St
The 3 line: Villanova, Louisville, Texas, Virginia
The 4 line: Florida, SMU, Iowa St, San Diego St
The 5 line: Nebraska, Georgetown, Gonzaga, Iowa
The 6 line: Colorado, UCLA, Syracuse, Michigan
The 7 line: UConn, VCU, Kansas St, Oklahoma
The 8 line: Cincinnati, Dayton, Ohio St, Minnesota
The 9 line: Pittsburgh, Harvard, UNLV, Memphis
The 10 line: Louisiana Tech, Stanford, LSU, Northern Iowa
The 11 line: BYU, Utah, George Washington, Xavier
The 12 line: Akron, Green Bay, UTEP, Notre Dame, St John's
The 13 line: Illinois, Toledo, Iona, New Mexico St, Murray St
The 14 line: Stephen F Austin, UC Irvine, American, Georgia St
The 15 line: Wofford, IPFW, Coastal Carolina, North Carolina Central
The 16 line: Weber St, Towson, FGCU, Hartford, Robert Morris, Arkansas-Pine Bluff

Bubble in:
UNLV
Memphis
Stanford
LSU
Northern Iowa
BYU

Next 4 in:
Utah
George Washington
Xavier
UTEP

Last 4 in:
Notre Dame
St John's
Illinois
Toledo

Last 4 out:
Baylor
Seton Hall
New Mexico
Florida St

Next 4 out:
Oklahoma St
Arkansas
Indiana
Georgia

On the board:
North Carolina St, Tulsa, Richmond, Western Michigan, Old Dominion, Wyoming, California, St Mary's

Break it down!
Big 10 8
ACC 7
Pac 12 5
Big 12 5
Big East 4
AAC 4
A-10 3
SEC 3
MVC 2
WCC 2
MAC 2
CUSA 2
MWC 2


Bracket will come soon enough.  Some posts analyzing the tournament setup this year will be posted before it goes up.

Thursday, October 2, 2014

We're baaaaaaaack

It's time to start thinking about the upcoming season.

I'll post a few short ditties up over the next week, getting everyone ready for the new season and what to watch for, from a bracket standpoint.  Then, October 10, look out for the first bracketology of the season - preseason edition.

So prepare your bodies.  We're back.

Monday, March 24, 2014

Closing time

You don't have to go home, but you can't stay here.

This marks the official end of Bracketball's analysis of the 2013-14 season.  In reality, it ended at 6PM EST on Selection Sunday, but I had a group of reaction posts I wanted to write about the process.  I've gotten all of them up now.  Of course, I might think of something else I want to say, but for now, I'm done with the 2013-14 season.

Sometime in the summer I'll play around with a first preseason bracketology for next season, and I'll start talking about various scheduling quirks that pop up.  But otherwise, the blog'll go dark for awhile.

Sunday, March 23, 2014

Conference hierarchy, one more look

Remember the preseason when I posted my conference hierarchy?  Let me post my preseason rankings, and see how I did.

Tier 1:  Royalty
1) Big 10
2) ACC

The B1G ended up 2, but the ACC was 5th.  ACC had plenty of power at the top, and 9 of 15 teams were in the top 100.  The issue was that BC and VT bottomed out below 200.  Once again, the bottom hurts the rest of the conference.

Tier 2:  Power conferences
3) Pac-12
4) SEC
5) Big East
6) Big 12

Well, I missed on the Big 12.  #1 overall.  Only 10 teams large, everyone but TCU would up in the top 125, which is the recipe.  Nailed the Pac-12, and the BE finished 4th.  So that leaves the SEC, which finished 7th.  And not just 7th, but 7th by a lot.  There's a clear separation between the top 6 and the SEC.  They were a tier down from the other three conferences in this list.

Tier 3:  Purgatory, part 1
7) AAC

The AAC ended up 8th, about level with the SEC.  The bottom half was completely awful.

Tier 4:  Purgatory, part 2
8) MWC
9) A-10

The A-10 had a big season with 6 teams inside the RPI top 50.  Another 3 teams inside the top 100 was just as key, eliminating deadweight potential.  This got the A-10 to 6th overall.  The MWC, on the other hand, regressed badly to 10th.

Tier 5:  Don't call us mid-major
10) MVC
11) WCC

In a strange dynamic, the WCC beat the MWC, getting to 9th behind 4 top 70 teams.  They had better top-to-bottom depth than the MWC.  MVC had a really down year and still held 11th.  I think we can safely say that there is an 11-conference breakaway in college basketball when it comes to relevance.

I won't reprint the rest of the tiers, but things that stood out:
1) The MAC and CUSA were 12th and 13th, pretty clearly separating from the rest of the pack.  They're a tier of themselves now.
2) The next grouping of conferences:  Horizon, CAA, MAAC, Summit.  Summit was the outlier because NDSU overperformed.
3) Football money does not matter for the Sun Belt.  Finished 19th.
4) The WAC way overperformed in 21st place, because of New Mexico St.
5) I had the OVC 15th entering the year.  Finished 24th.  Oops.

So with all this in mind, here are my new tiers for future years:

Tier 1:  Big 10, ACC - not tempted enough to change this, yet
Tier 2:  Big 12, Pac-12, Big East, SEC - the order within this tier changes, but not the grouping
Tier 3:  A-10, MWC, AAC - this group is clearly below Tier 2.  AAC is about to get smacked with the realignment stick again, so they belong here
Tier 4:  WCC, MVC, CUSA - I'm going to give CUSA the bump up to this tier.  It's debatable.  I think we'll see a 12-conference breakaway now
Tier 5:  MAC, MAAC, Horizon, CAA - Conference numbers 13-16 here.  Just good enough to be ignored by the selection committee every year.
Tier 6:  Sun Belt, Summit, Ivy - Ivy is carving out a niche in the middle of the tiers here.  These are conferences #17-19.
Tier 7:  OVC, Patriot, Big West, A-Sun - Conferences #20-23.  These are the ones who can realistically hope to win a game in March every year, and who won't bottom out.  The common trait?  Top-tier teams who can remain constant threats (Murray St, Belmont, Boston, UCSB, LBSU, Mercer, FGCU).
Tier 8:  Big Sky, NEC, S'land, Big South, A-East, WAC, SoCon, MEAC - I see these guys being interchangeable going forward.
Tier SWAC:  SWAC

Ok, one more RPI note

I always think it's fascinating to see the highest RPIs left out of the tournament.  So here they are:

33 Southern Miss
38 Toledo
49 Missouri
50 Minnesota
53 SMU
54 Florida St
57 Belmont
58 Green Bay
59 Iona
61 St Mary's

Actually a pretty good mix of high-major and mid-major here.  No trend can be discerned from this.

Worst RPIs to get an at-large bid:

56 Iowa
55 North Carolina St
51 Kansas St
48 Nebraska
47 Xavier

Again, no real outlier.  This is a pretty quiet year.  Normally when I do these, there's more volatility and clearer biases.

Friday, March 21, 2014

A note on RPI

Some final thoughts on how RPI is used.

The selection committee has done a good job of ignoring individual teams' RPI in the selection process.  However, the RPI still matters when it comes to assembling lists of records vs. RPI Top 50, Top 100, and so forth.  If a metric is not good enough to be used for an individual team, but is good enough to be used to group said teams, isn't that contradictory? 

This is why I like to look at average RPI win and average RPI loss a bit more.  This helps balance out any imbalance in the numbers.  Beating a team twice with an RPI of 51 is fundamentally different than beating a team twice with an RPI of 100, but using average RPI win as a stat is the only way to get that to show up in the data, without looking at the actual list of results.

Which brings me to a fundamental issue with RPI and "bad losses" and "good wins". 

Let's take 4 teams.  Let's say Team A is undefeated, 1.000 winning percentage (30-0) and team B is a good .800 team (24-6).  Team C is a bad .300 team (9-21) and Team D is a really bad .050 team (0-20).  Records are uneven, but whatever, this is an illustrative example.

According to the way RPI is calculated, the RPI sees the difference between Teams A and B as being dead equal as the difference between C and D.  However, the difference in beating Team A against B is big.  Now, beating either Team A or B would be a signature win, but one is more signature than the other.

Now look at what happens with a win against Team C or D.  In either case, the public perception of the team doesn't change.  They beat a bad team.  However, the RPI sees a difference in beating the two teams, the same difference it would see between Teams A and B.

Let's say Team C has a 225 RPI and Team D has a 350 RPI (reasonable).  From public perception, the difference in wins is negligible, and a loss against C is just as harmful as a loss against D.  But according to the RPI's perception, the difference between C and D is large.

And therein lies the problem.  The public perception says any win over a team outside the top 150 is mostly useless in evaluation.  However, from the RPI formula's point of view, there's a big difference between a win over a RPI 175 team and a RPI 325 team.  This results in distorted RPIs that punish teams far too much for playing bad teams and doesn't reward enough for teams who play great teams

What the RPI needs is a weighted adjustment.  There shouldn't be a big difference between playing a RPI 225 and a RPI 350 team.  We should scale down the effect really bad teams have on RPIs compared to the merely below-average.  Similarly, we should be able to scale up wins against terrific teams.  Right now teams benefit more from avoiding bad teams than scheduling good teams.  We need to emphasize scheduling great opponents, while de-emphasizing the need to purge every single cupcake from the schedule.

This is something I hope someone takes a look at.  What happens if you replace every horrible team on SMU's schedule with, say, the RPI 225 team?  Take the 6 or so horrible teams, replace them with merely bad teams, give SMU easy wins in all of them...what happens to their SoS and RPI?  Do they make it in the tourney?  Perhaps.  And yet, SMU would have ended up with the exact same on-court results against either schedule.

Given the expansion of D-1 in recent years, it's worth exploring ways to minimizing penalties for playing the worst of the worst.  Non-con scheduling should be about finding the best games, not avoiding the worst games.  The emphasis point needs to change.

Thursday, March 20, 2014

A note on geography

So Wichita State got a loaded regional.  Here's why.

The committee likes to put teams into the bracket in such a way that travel is minimized for the teams and their fans.  So let's look down the seed lines and see how they did that.

Villanova, as the top 2 seed, got to be placed in the east.  Michigan was next, and obviously got placed in the midwest.

On the 3 line, Duke was the top 3 seed.  Geographically, their preferred region is the midwest, not east (least travel).

On the 4 line, Louisville was the top 4 seed.  Geographically, their preferred region is the midwest.

On the 8 line, Kentucky was the top 8 seed.  Geographically, their preferred region is the midwest.

So now we see the problem.  Wichita gets the toughest 8 seed, followed by the toughest 4, followed by the toughest 3 or the 2nd toughest 2.  That's imbalanced, period.  Wichita got a tougher draw than others.  Because of geography.  Because the committee tries so hard to keep everyone close to home.

The NCAA needs to stop this.  I get the concept behind their geographical-based methods.  But a fair bracket should be of primary importance.  Geography should be secondary to a fair and balanced bracket.  The NCAA needs to revisit their policy and introduce rules that force them to create more balanced regionals.

This problem also shows up in other ways.  The AAC has 4 teams in the tournament, but 3 would up in the same regional.  Cincy, Memphis, and UConn are all in the east regional.  Naturally, they all went there because they're eastern teams.  I'd rather see the NCAA reintroduce the rule that forces the top teams from each conference into different regionals.  It's not fair to a conference to be loaded up into a single regional.

The NCAA is almost there in terms of a pure, fair bracket.  They just need to de-emphasize geography just a little bit.

One more thing:  if you're the top team among teams in a seed line (say, Kentucky and the 8), you get geographic priority over the other 8s.  Therefore, you could make the argument a team would rather be the top team on a seed line instead of the last team on the above seed line.  You'd rather be the first 7 seed than the last 6 seed.  Because with the first 7 seed, you get geographic priority, and the last 6 gets the last available spot.  That needs to be fixed.