ESPN getting on the RAPM bandwagon "Real Plus Minus"

[Dr Positivity]

Wrote a longer response but decided it's not worth it. If you're not interested in discussion or sharing knowledge without doing it in an arrogant/come at me bro way, there isn't much point. I only gave my perspective on the matter (I will concede however that the segment including the phrase confirmation bias in a accusatory way, was a poor/insulting choice I apologize for - a better way to say the point, was that the possibility of something like confirmation bias is why someone may be suspicious of APM's credibility/trustworthiness if not transparent. And frankly the whole train of thought was a largely unnecessary inclusion with the rest of the post, so I will edit it out)

[lorak]

Wrote a longer response but decided it's not worth it. If you're not interested in discussion or sharing knowledge without doing it in an arrogant/come at me bro way, there isn't much point.

LOL, I don't know how you've came to such conclusion. Mystic is sharing his +/- knowledge with great detail and no one did more here to explain APM/RPM than him. And if he sometimes says that someone doesn't have enough knowledge, then it's not reason to feel offended - like in your case.

[Dr Positivity]

From a forum etiquette perspective there's much better/more mature ways to respond to posts than he did

[mysticbb]

From a forum etiquette perspective there's much better/more mature ways to respond to posts than he did

Yeah, that's not my strongest trait. :) I can get easily frustrated with people, if they either are not picking up stuff as quickly as I expect them (which is likely more related to my inability to give a useful explanation for others, while I rather tend to express the thoughts in my head, which sometimes asks for big leaps and requests more knowledge from the reader than I anticipate while writing) or I get the impression that their argumentation is not honest.
So, yeah, you are right, there are better ways and I apologize for that and hope that I can restrain myself better in the future.

[Doctor MJ]

Now the obvious response to this is who cares about what a guy who's been replaced in prominence did in 2004, but my point was more that if the closest thing to a APM pioneer is making a mistake like THAT, it puts a dent in his credibility.

What? Rosenbaum did not make a mistake, he simply used his best knowlegde (which may be lower than the knowledge of others) to create a better overall metric than APM alone is. That's all he did. That doesn't change the underlying math of OLS or Ridge Regression at all. Really, your argumentation is dishonest, to say the least.

This is the key point for me. Rosenbaum wasn't doing anything wrong, he simply wasn't doing what Arturo thought he was doing.

One can point out: How can people so pro-APM when even guys like Rosenbaum think you need to add other things to the mix for it to be of best use?

But I would then point out: Such is the case with every metric. If one comes in thinking otherwise, then that's a problem with their thinking - and it's no shocker that the guy making the mistake here is a member of the Wins Produced community given how bold they've been about how much they think can be achieved from that one single stat.