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The Power Four => Big Ten => Topic started by: medinabuckeye1 on September 09, 2025, 03:34:57 PM

Title: HFA Deep Dive for Stats nerds
Post by: medinabuckeye1 on September 09, 2025, 03:34:57 PM
I can share more of the data behind this but what I did is I compared the Home and Away records of the 11 Big11Ten teams (membership from when PSU joined until UNL joined) against each other only.  I looked at 1993-2023.  I started with 1993 because that was Penn State's first year in the league and stopped with 2023 because Stassen hasn't updated to include 2024 yet.  Here is the summary:
(https://i.imgur.com/OddrCyg.png)

So I guess those Pink Visitor locker rooms really do work, eh?  

Most of this makes sense to me but there are some outliers that, for now, I've just chalked up to randomness.  If you look at the five teams with the least HFA, two of them are two of the worst three overall (#10 IL and #9 MN) and another two are two of the best three overall (#1 tOSU and #3 UW).  That makes sense.  Illinois and Minnesota are usually bad enough that they are going to lose most of their games regardless of location.  Conversely, Ohio State and Wisconsin are usually good enough that they are going to win most of their games regardless of location.  

On the other end of the spectrum, four of the six teams with the biggest HFA are among the "middle five" overall (#5 IA, #4 PSU, #6 MSU, #8 PU).  

The outliers and my theories on why they are:
As the #2 team in the league, Michigan shouldn't have that much HFA.  I think they do because they didn't get to be a distant #2 (much closer to UW than tOSU) by being consistently a distant #2.  Instead they got there by being a REALLY close #2 for part of the time and well below #2 the other part.  My theory is that they got a lot of HFA help when they were well below #2 and more in the middle of the league where HFA matters the most.  

As the worst team in the league, Indiana shouldn't have much HFA at all.  I really can't explain why theirs is second highest.  Maybe part of it, at least as compared to IL and NU is that I think IU has been more consistent than those teams.  Without deeply researching it, it 'feels like' NU and IL have been a bit more Jekyll and Hyde with league championship highs and just flat awful most of the rest of the time whereas IU has been consistently a bit better than IL's and NU's lows but without the top-end.  I don't know.  

As the #7 team in the league, Northwester aught to have pretty strong HFA but theirs is even les than Ohio State's.  This is probably because of the Jekyll and Hyde nature of their performance (see previous paragraph).  
Title: Re: HFA Deep Dive for Stats nerds
Post by: medinabuckeye1 on September 09, 2025, 03:39:23 PM
To test my theories I also looked at the SEC for a comparison so @OrangeAfroMan (https://www.cfb51.com/index.php?action=profile;u=58) , @rolltidefan (https://www.cfb51.com/index.php?action=profile;u=12) , other SEC fans, you might be interested in this.  Here are the SEC results:
(https://i.imgur.com/PD7Ks1O.png)
For the SEC I used the 12 teams that made up the league from the 1992 football season up until the recent expansions.  Looks similar but the SEC is a bit flukier because they've had divisions longer so the non-protected non-divisional match-ups were only played about 8-10 times in the 32 seasons from 1992-2023.  That small sample size gets even smaller when you cut it in half for H/A.  Also, the SEC has a LOT more neutral site games such as the WLOCP which throw things off a bit.  

In each league the H% was almost exactly 0.100 above the A%.  That is interesting.  
Title: Re: HFA Deep Dive for Stats nerds
Post by: Cincydawg on September 09, 2025, 03:42:51 PM
The Bobs did a similar analysis years ago using point spread in conference games and he noted the SEC had the smallest HFA by that metric of any major conference, but a fair bit.
Title: Re: HFA Deep Dive for Stats nerds
Post by: medinabuckeye1 on September 09, 2025, 04:22:10 PM
The Bobs did a similar analysis years ago using point spread in conference games and he noted the SEC had the smallest HFA by that metric of any major conference, but a fair bit.
FWIW:
That is way more data than I wanted to mess around with.  I just used straight up W/L so it makes no difference if a team won by the skin of their teeth or blew their opponent out, just W's and L's.  
Title: Re: HFA Deep Dive for Stats nerds
Post by: betarhoalphadelta on September 09, 2025, 05:09:18 PM
As the #7 team in the league, Northwester aught to have pretty strong HFA but theirs is even les than Ohio State's.  This is probably because of the Jekyll and Hyde nature of their performance (see previous paragraph). 
You all know I don't like narrative-building... Sometimes the data is just noisy. 

But I wonder if someone like Northwestern falls for some pretty simple reasons: 


We all joke about how the stands at Northwestern are full of opposing fans most of their "home" games. But maybe there's something to it? 

On the opposite end, Iowa is nearly the most westerly of the Big11Ten teams, and is also nowhere near any large metro area. It's drivable from Chicago/Champaign/Madison/Minneapolis, but it's uncomfortable travel from literally anyone else in the conference. It's also Iowa, so it's not like there's a tremendous metro area attracting alumni from competing conference schools. 

Maybe that's an explanation for Iowa's outsized HFA? Nobody from other fan bases ever go there? 

I don't know if any of this actually has an effect, or how strong the effect would be, but I can see it being somewhat plausible... 

Title: Re: HFA Deep Dive for Stats nerds
Post by: OrangeAfroMan on September 09, 2025, 08:13:27 PM
I've got to think there's another aspect to this kind of thing.  I recall UGA under Richt having a stellar road record.  Doesn't your HFA seem weakened by your above-expected performance on the road?

OSU has a ceiling on HFA because look at it, their road win% is above anyone's home win%.  Shit.  If their HFA was any higher, they'd have won a dozen NCs, lol.  So somewhere in the ingredients, there's got to be an aspect we're failing to incorporate.  I haven't ever spent much time on it, so idk.  

Also, 

.731 Florida
.732 Alabama

God damn, Spurrier was a dude!!!