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Disposal efficiency/effectivness

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There was a stat or rating by champion data going around that rating kicking efficiency taking degree of difficulty into account.
 
I don't get why this isn't a stat
Net Effective Disposals - Effective Disposals minus Clangers
Still based around effective disposals so players who are good at accumulating don't get overlooked with a purely effective disposal percentage. However clangers are taken away as they are detrimental.
Also differentiates between a ineffective disposal and a clanger. A bad kick to a player 35 metres away on the lead that gets spoiled out of bounds would be a bad kick under disposal efficiency, however it isn't a clanger by any means. It's just a bad kick that should have been flatter or put in front of your teammate. A clanger should be counted differently.


Frees against also count as clangers so they aren't totally relevant to a discussion purely about disposal.
 

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Imagine you have two midfielders..

Midfielder A is a decent midfielder who is unambitious and generally looks to link up with other midfielders. He operates @ 75% by foot when kicking to other people in the midfield/half forward.

Midfielder B is a gun who is your prime user (Goddard type) when kicking inside 50, he hits blokes on a lead a lot. He operates @ 68% by foot when kicking to leading targets inside 50.

You tell me who is more important. (Hint: It's not the guy with the higher disposal efficiency)

There was a soccer paper a few years ago that proved pass completion rates were much more strongly correlated with the player's position, and the position he was passing to, than the individual skill of the player. I.e., it's more important to know the context of each pass, and what the player was trying to achieve.

Relying on a raw efficiency number is useless, especially in AFL where there are two distinct categories (kicks and handballs). Basically the stat suffers from Simpson's Paradox
 
Yeah nah. So many one-two handballs would be considered efficient, but hardly impact the game. Dudes chipping it around down back hardly impact the game. A good long 50-60m switch kick is different. But 20m kicks backwards do not impact at all.
like Dain swan & brent harvey
 
I'd rather have a player go in and get the ball 30 times and **** up 10 of those, than only go in 15 times and **** up 3 of them.

Percentages are too neat a measure.

Again, depends on where these **** ups occur and the result. If they result in 10 turnover goals, then maybe not. If the guy getting it 15 times is playing a defensive role where he limits a gun opposition player, then maybe he is doing better. If one has better 1% stats where he is blocking for, or tapping the ball to a teammate, he's not getting the disposal stats but he is very much in the game.

It is nearly impossible to formulate opinions based on our stats. They are a guide but they are all flawed. If there was a measure of the scale of pressure on a kick, how far each went, whether you had to spot up a teammate between two opponents, that would be getting close.

I use efficiency stats combined with contested stats, and then look for workrate ... tackles, I50s v R50s for midfielders. They paint a credible picture but are not absolute.

We are so underserved by our AFL stats. The NFL and MLB stats are awesome and huge talking points. It would be nice if we had some real access to the deeper statistical analysis they do.
 

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It is nearly impossible to formulate opinions based on our stats. They are a guide but they are all flawed. If there was a measure of the scale of pressure on a kick, how far each went, whether you had to spot up a teammate between two opponents, that would be getting close.

We probably could form an opinion based on stats, however the required stats are not easily available to the general public.

Efficiencies split up into:
- short and long kicks, and the efficiencies in the various zones (forward, middle, defence), contested and uncontested;
- short and long handballs, and as above;

Then compare a player's efficiencies for all of the above against the average of all players.

That Cyril Rioli article from CD a few seasons ago was very good...too bad all that info isn't easily accessed.
 

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Disposal efficiency/effectivness

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