pancakes3 wrote:NO-KG-AI wrote:Seems like the people that get the most angry about KG being placed high, are the ones that are most likely to disregard research and go into "well I think" or "the wolves weren't that bad, just because" type of arguments, and crap all over the impressive amount of research and number crunching guys like ElGee, drza, Doctor MJ, and MysticBB do.
shrug. KG at 13 just seems wrong to me especially when
the only argument of merit is based on APM - the same stat that said KG was not in the top 10 in APM during his 3 lost years, led Pierce in APM on the C's by 0.8, lost out to Allen the next two years, and this past season Allen went from +9 to -4 with no visible change in role or production.
bonus cherrypicked APM factoid: in '06, KG finished 2nd in APM to Marco Jaric, and had a lower APM than Kobe (or brian cardinal for that matter).
I think people still aren't quite on-board with exactly what APM is and where it's coming from. To many, I think APM is just another acronym advanced stat like PER or Win Shares, and that it's thought of as just another alternative to them. But really, APM is coming from an entirely different direction. +/- stats as a family, in fact, are an entirely different way to gauge basketball value than the box scores. As such, saying "only argument is APM" isn't really conveying an accurate message, and with the follow-up examples you give it's clear that you're not entirely grasping why KG being the APM king for his generation is such a powerful argument. Here seems like as good a place as any to attempt a non-numbers/theory based explanation for why APM stats are so vital to our basketball discussions.
For a long time there has been a sentiment in basketball evaluations that the box scores weren't enough to completely understand the game. I mean, think about it. Many people felt that Russell was better than Wilt as an individual player, and there's absolutely no way to really justify that based on what the box scores tell us. The tendency, then, became to look at team results and use that as justifications...but again, that's not fully satisfying, because you can't just divorce a player entirely from their team when judging team results. Well, let me rephrase, some do, but the logic gets more stretched and tortured the closer you look at it because you have to make some pretty big leaps/ignores in order for the team-results-reflects-individual-value reasoning to work. Then, another tendency is to attribute any player value not reflected in the box scores to "intangibles"...this player wins more because he "wanted it" more, or he's "more clutch", or a "winner", or a better leader, or some other thing that falls into a slush category of things that characterize good play but that the boxes aren't equipped to measure.
The unsatisfying conclusions that one gets from trying to rank players with just these other three methods (box scores, team results, intangibles) are what led to the rise of the +/- stats, because these stats potentially take the best parts of all 3 other methods and put them into one place. Because +/- stats rely ONLY on how a player's team does when that player plays, it from the start is inherently attempting to quantify a player's contribution to team success. There's no such thing as "empty stats" when it comes to the +/- stats...you can't "stat pad" +/-...there's no selfish "gotta get mine" element to +/- stats...potentially, this is a type of stat that could really get to the heart of what we actually most want in ranking an individual: his impact. And because there aren't just arbitrary skills/results measured and recorded (like the box scores), the +/- stats have the potential to evaluate the ENTIRETY of a player's contributions...including all of the things that previously were considered "intangible"...with these stats, if done right, the intangible could become downright tangible.
Jumping back a bit, I would say that +/- stats are indicative of the larger mindset that looks for all of the ways that a player impacts the game...including what's in the box scores, but not limited to it. And while the +/- stats are only available for the last decade, we can use that mindset to, at least in a rough sense, attempt to evaluate individual impacts as far back as we have viable information. I keep seeing people (usually those that weren't in the RPoY or current Top 100 project) that aren't satisfied with a particular result in the rankings that will make an assumption about WHY that ranking came about...that really isn't reflective at all of what actually happened in the project. To whit:
Bill Russell. Many of the complaints that I see about Russell ranking so high relate to the assumption that he got his ranking purely on the back of his 11 rings. When in reality, and I can only speak for me and my vote, that isn't the case at all. I knew Russell had 11 rings before I did the RPoY project last year, and at that time I wasn't fully convinced he was actually a better player than Wilt. But what sold me was further analysis of how those Celtics played, how the reason that they won could very quantitatively be traced to their defensive dominance, and that said defensive dominance could very quantitatively be traced to Russell. Now, this wasn't exactly a +/- measure because that level of detail wasn't available, but it WAS an application of the same line of logic. That a player was making an obvious contribution, impact to winning team play that the box scores weren't equipped to measure. I didn't vote Russell for #1 because he had 11 rings...I voted Russell for #1 because he was by-far the most impactful player of his generation in a quantifiable way...that had absolutely nothing to do with the box scores.
Bill Walton. Another similar situation, but on a smaller time scale, was Walton vs Kareem in the late 70s. And again, by looking at how the Trail Blazers played with and without Walton (a bit more information was available for the 70s than the 60s, plus Walton missed so many games that +/- estimates were more possible) we could see that Walton was having a much, MUCH bigger (yet still quantifiable) impact on the Blazers winning than what the box score stats were equipped to capture.
Oscar Robertson. Same thing. By pinning down Robertson's role as the offensive engine for the Royals, and that the Royal's offense was dominant even when the team wasn't, I was convinced of Oscar's continued high impact even in the face of his team not experiencing as much success as some of his contemporaries.
Magic Johnson. He played in the 80s with closer to modern stats but still no +/- stats, yet examinations of just how potent the Lakers' offense was and just how much of it could be tied to Magic's play are what convinced me that he should get my vote for #3 all-time even over Kareem or Wilt with their more impressive box score stats.
I could continue, but I think you get the point. This way of thinking, of trying to evaluate players based on their direct contribution to winning basketball...essentially, on their impact, is pervasive even beyond +/-. In fact, all +/- stats are, really, are the most polished and powerful way that we currently have to try to quantify those types of evaluations. And, importantly,
the method keeps evolving and getting better.The last is important because it plays into another misconception that I see, that there's such a thing as "the APM". There is no one "APM" calculation that is correct. Instead, every statistician that makes an APM calculation does the analysis in his own way, which is why the values may change depending on whose you look at. Ilardi's APM is different than Wayne Winston's APM which is different than the basketballvalue APM which is different from Engelmann's RAPM. Which is completely natural, and the same thing that occurs with evaluating box score stats. Many people look at the box scores and make their own rough estimations of what is good, but each person's way is different. Then, you have those that like to look at newer information such as TS% or rebounding rate, but again, every person's composite evaluation will be different. Then you've got your Holinger (PER) Kubatko (Win Shares) or Pelton (WARP) types that attempt to create composite box score stats in a consistent way, but all of their calculations are different as well. This is the exact same thing as what happens with the +/- stats, but because +/- is relatively new and has the unfortunate issue that all of the advanced +/- calculations call themselves by the same name of "Adjusted Plus Minus" I think it confuses people unnecessarily.
Which brings us back to the actual post that I'm rebutting. Pancake, the examples that you're using aren't really that strong in supporting the point you're trying to make, because we have so much +/- info for these last few years that show that those examples you name are likely flukes. For example, you say that APM says that KG wasn't top-10 in his "lost" years (presumably 2005 - 2007, when the Wolves didn't make the playoffs). However, Engellman's RAPM (which is currently the "state of the art" for single-season APM calculations) have Garnett as 1st in 2005 edging out Duncan (
http://stats-for-the-nba.appspot.com/ranking05), 2nd in 2006 just behind Duncan (
http://stats-for-the-nba.appspot.com/ranking06 ), and tied for 4th in 2007 behind Ginobili, Duncan and LeBron (
http://stats-for-the-nba.appspot.com/ranking07 ). Likewise, Ilardi's multi-year 2004 - 2009 APM measure (the current state-of-the-art in APM studies overall, better than any single-season APM calculation including Engellman's RAPM) has Garnett as by-far the highest ranked player in the NBA over those 6 years which include all 3 of his "lost" years.
And the same is true of the Celtics years, where both RAPM (single season) or multi-year APM calculations from 2008 - current (i.e. Garnett's Celtics years) both show that he was clearly and distinctly the largest impact player on those Celtics during these years.
And the reason that RAPM or multi-year APM studies are better than older, more standard single-season APM measurements is because these methods were developed specifically to combat weaknesses in the previous APM calculation. It evolves. Pure +/- was cool, but it was entirely too reliant on the caliber of your team. Net on-court/off-court +/- was better and it addressed the team caliber issue, but it was too reliant on things like substitution pattern, back-up quality, level of competition and blowout concerns...which is what gave rise to the original APM calculations, which attempted to address some of these issues. Then, APM calculations had their own weaknesses...the need for a large sample size, potential collinearity, year-to-year variance. And these issues are what RAPM attempts to address on a single-year basis, or what multi-year APM addresses over longer periods of time. Which is why they're currently the best APM methods to use. But the science keeps getting better all of the time.
ConclusionSo, completing this book-like post that I'm sure many already DR;TL skipped, the summary points are:
1) Analyzing an individual's impact on team results is its own evaluation method, of which APM is only a part.
2) "APM" is a bit of a misnomer, as there are actually many different ways to calculate APM and these methods are continuously getting better
3) Thus, finding counter-examples from older/not-as-good versions of the stat aren't really any good for use as counter-arguments. They're essentially outdated.
4) And, regarding Kevin Garnett, the fact that he's the APM king for his generation isn't just a single support stat like PER or Win Shares. It's actually a reflection of the fact that, for those that really try to evaluate beyond just what the box scores tell us and pin down how much impact an individual player had, Garnett really may have been the best player of his generation just stuck in terrible circumstances. And as such, even his rank of 13th in this project may still be a bit lower than where he actually should have gone. But as always, the debate continues...