Collaborative Filtering and the Rise of Ensembles 58
igrigorik writes "First the Netflix challenge was won with the help of ensemble techniques, and now the GitHub challenge is over, and more than half of the top entries are also based on ensembles. Good knowledge of statistics, psychology and algorithms is still crucial, but the ensemble technique alone has the potential to make the collaborative filtering space a lot more, well, collaborative! Here's a look at the basic theory behind ensembles, how they shaped the results of the GitHub challenge, and how this pattern can be used in the future."
Re:Open source governance (Score:1, Insightful)
Thing about gov is everyone insists on having equal voting power... and the whole reason ensembles work is due to unequal weights---maybe those who vote "better" than others are given more voting weight?
Re:Open source governance (Score:3, Insightful)
"better" would require a fitness function; and everyone thinks that they vote "best".
If it were possible to define such a perfect function, we wouldn't really need voting anyway. We could just get a computer to crunch all the parameters and spit out a utopia.
Re:Management Summary ? (Score:3, Insightful)
Algorithms produce better results working in committees, unlike you.
Re:Open source governance (Score:3, Insightful)
Giving everyone one vote already does that, without the ability to game-in discriminatory effects through poll tests (the ability to game-in discriminatory effects comes when you give people the right to write the questions and determine what the "correct" answers are, which is essential to having such quizzes); the more passionate are more likely to participate in politics (whether by voting or otherwise), and the more informed are more likely to realize their goals through whatever action they take, so both passion and information are already rewarded.
"Merit" is subjective; all elitisms view are justified (esp. by the chosen "elite") as some kind of meritocracy.
Re:Group Labor (Score:1, Insightful)
No, I think his pond is just too deep for you.