Doctor MJ wrote:trex_8063 wrote:Ah yes, RAPM. That holy grail of stats, which we can always take at face value, dispensing with the need for any other measures because RAPM is wholly complete and never misleading (although in '12 in ranked Kevin Durant 43rd in the league, as well as 20th in '13, and only 8th last year; in '03 it ranks McGrady 71st!?!, and so on...)
Context matters. If you don't believe in using with/without information to make causal statements, while I'd say you're misguided, I get it. You can't though use the technique in one stat and then scoff at using it in the mother stat. To the extent any of your anecdotes hear are at all damning of RAPM, they also damn all the work using on/off on teammate shooting.
And of course, all the anecdotal complaints have been responded to a million times here. If they don't satisfy you fine, but people like me aren't using them blindly, and when I make statements about players in a GOAT list discussion it's based on what we see year after year.
I'm not "damning" RAPM in favor of all other measures. I'm arguing
against doing the opposite (damning all others in favor of RAPM, and citing it's potential for error as a reason why). Which, maybe I misinterpreted, but that sure seemed to be what you were implying here:
Doctor MJ wrote:Look the bottom line is that what you're doing is using on/off stuff, and the overall on/off stuff (RAPM) makes Iverson look like.....
Paraphrasing--->"Bottom line is", you need not bother with
any of this other on/off stuff you took the time to do (with/without win%, SRS, ppg, ORtg, Team/teammate ts%, maybe BPM was considered in there too??), because we have RAPM: case closed.
I don't agree with that. I don't like putting all my eggs in one basket (or even just 2 or 3 baskets). We've debated in the past, with somewhat different context, regarding criteria: you arguing it should essentially be pretty narrow, reasoning being that the more criteria you add the more cluttered things become and the more difficult it gets to make sense of all the information, maybe making it
too difficult to accurately assess everything.
I, otoh, disagree. Any statistical measure or variable you choose to utilize has it's own failings, inaccuracies, and biases. Any narrow focus philosophy for player evaluation is going to be by definition selective for certain players and exclusive to others. That's why I like taking the very broad approach. The more variables I involve, the inaccuracies and biases of the
individual variables (both statistical and contextual/philosophical) get diluted out in the masses; hopefully leaving me with a fair and even playing field.
Have I disregarded RAPM in Iverson's case? No, I have not. Have I brought it up? No, I have not. It was purely a tactical choice, as it's not as flattering to him as other measures (also, within the context of this thread, most of his main competition doesn't have RAPM data available to compare to anyway).
But since we're on the topic, I'll address it. Where RAPM is concerned, Iverson's more or less on par with the guy who's apparently about to take #53 in this project: Pau Gasol. Below are comparisons of non-scaled PI* RAPM (*NPI for '01):
Best 3 yearsGasol: +7.74
Iverson: +6.48
Best 5 yearsGasol: +10.22
Iverson: +9.89
Best 7 yearsGasol: +11.95
Iverson: +11.69
Best 10 yearsGasol: +12.14
Iverson: +12.78EDIT: Also worth noting that RAPM is a per #possession stat, and Iverson was playing WAY more possessions per game than Gasol throughout their respective primes.
Doctor MJ wrote:trex_8063 wrote:
His impact in Philly appears to have been comparable to KJ's in Phoenix based on collective team measures. And his defense is not as negative as Steve Nash's, but in Nash's case we were allowed to wave that away on the premise that PG defense is sort of masked by the team, and generally of small importance. If so, I don't quite get why this needs be a big consideration.
Can you elaborate on "collective team measures"?
What I referred to above, which I'd taken the time to investigate and post in these last 2-3 threads: with/without record/win%, SRS, ORtg, ppg, ts% (both total team, and teammates only).
Doctor MJ wrote:Re: Defense not as negative as Nash's...waved away. Nash's defense wasn't waved away. He's an offensive GOAT candidate who, quite correctly, wasn't seriously treated as a strong candidate for the first month plus of threads in this project, and defense was a big part of that.
Then there's the matter that with the numbers I see in RAPM, I don't see the basis for saying Nash was clearly worse than Iverson.
Most practically though, when we at times tell be to chill on the effect of point guard defense in relation to guys like Nash, it's because we know the ratio of the impact is really small.
Nash's scaled PI ORAPM in '06-07 was +10.22, while his DRAPM was -1.94. Massive ratio. Absurd to treat it like that defense was doing anything remotely like canceling his offense out.
For Iverson the best year we have for him in ORAPM is '99-00, and he rates a +5.77. So even if his DRAPM were the same as Nash's, ratio-wise it's a much bigger deal.
(In reality it's worse than that though. His DRAPM that year was -4.46. THAT is the real problem here. Iverson in his prime was absolutely a Top 20 level offensive player and maybe even more, but the defense quite literally ate most of that impact away.)
While you have picked Iverson's best ORAPM year, this is also happens to be his single
worst DRAPM year, and outside of his first 3-4 seasons is not at all representative of his career as a whole (the shift is seen immediately after the season you mentioned).
Below is DRAPM (non-scaled) for both Iverson and Nash, using only the years where they were playing starter level minutes:
Nash'99: -0.83
'00: -1.67
'01: -1.0
'02: +0.1
'03: -0.5
'04: -1.6
'05: -0.8
'06: 0.0
'07: -1.5
'08: -0.58
'09: -1.24
'10: -1.57
'11: -1.45
'12: -0.84
'13: -1.41
Avg: -0.994
Iverson'98: -3.16
'99: -2.18
'00: -4.00
'01: +0.2
'02: -0.4
'03: -0.7
'04: -0.3
'05: 0.0
'06: -1.0
'07: 0.0
'08: -0.16
'09: +0.13
'10: +0.15
Avg: -0.878
So it's very small, but there (remove even 1 or 2 of those first years from the equation, and it becomes more noticeable). Add in other considerations, for whatever they're worth: DRtg (Nash +5.5 to league avg, Iverson +0.7), standard or box DPM (Nash career -2.5, Iverson -1.0), DWS (Nash 16.1, Iverson 38.1), etc......overall (to me, at least), there's little doubt Nash is the inferior defender between the two (but yes: Iverson's D is certainly nothing to write home about).
Basically, I would sum up the comparison to Nash as such: Iverson clearly not on Nash's level offensively, but in his prime
was fairly consistently at least a top 20-25 offensive player in the league (with at least 2-3 years as top 10---if not top 3-5---offensive player), was largely not
as poor a defender as Nash (and fwiw, Iverson was a better rebounding guard, too, though obv not a noteworthy rebounder). Nash has a little longevity on him. So given the nearly 30 places that have passed since Nash was voted in, I don't think this comparison precludes Iverson from consideration at this point.
"Never argue with an idiot. They will only bring you down to their level and beat you with experience." -George Carlin
"The fact that a proposition is absurd has never hindered those who wish to believe it." -Edward Rutherfurd