[yummyfajitas]

What is it going to take to convince you that the choice of model and which data to use as input is just as important as the analysis itself?

I'm already convinced of this. Are you trying to imply that the cox model is wrong or something? If so, why not just make that argument explicitly?

Of course, if the Cox model is wrong, why do you believe the algorithm is biased? Isn't that reason to disregard the entire ProPublica article (which is all based on the Cox model)?

Depending on the situation, using race or other protected classes is illegal.

Did you even read the article? "Northpointe’s core product is a set of scores derived from 137 questions that are either answered by defendants or pulled from criminal records. Race is not one of the questions. "

/sigh/

You can emote all you like. Reality does not change.

I must admit, the emotion on display here confuses me. Much like you I oppose racial bias. The R script provides evidence that very little racial bias is present in this system. Why does this inspire such negative emotion? It's almost as if you care more about looking anti-racist than you care about having racism's effects be reduced.