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SmartData Collective > Big Data > Data Mining > A Netflix Prize win is nigh: How they did it
Data Mining

A Netflix Prize win is nigh: How they did it

EricSiegel
Last updated: 2009/06/28 at 6:14 PM
EricSiegel
4 Min Read
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Breaking news: On Friday, Netflix Prize team “BellKor’s Pragmatic Chaos” passed the mark, qualifying for the $1,000,000 prize. The team includes last February’s PAW speaker Andreas Töscher.

But they haven’t won yet. Their qualification triggers a 30-day count-down during which all teams have a final chance to improve their efforts.

The Netflix Prize is an open contest in product recommendations. The competition has provided an incentive to teams worldwide to improve the state-of-the-art, and, in a sense, work as an extended R&D effort for Netflix to improve their movie recommendation accuracy.

How they did it: Joining forces. Only by an international collaboration, and the combining of methodologies, did the current leading team hit the mark. The team is composed of four teams that have also competed independently, located in the U.S., Canada, Austria and Israel.

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Combined methodology made simple. Each team has developed an intricate approach. Once they agreed to collaborate, how hard did they have to work to integrate their systems? Actually, not hard at all. Rather than dig in, think hard, and assess where one system’s weaknesses may be compensated for by another team’s …

Breaking news: On Friday, Netflix Prize team “BellKor’s Pragmatic Chaos” passed the mark, qualifying for the $1,000,000 prize. The team includes last February’s PAW speaker Andreas Töscher.

But they haven’t won yet. Their qualification triggers a 30-day count-down during which all teams have a final chance to improve their efforts.

The Netflix Prize is an open contest in product recommendations. The competition has provided an incentive to teams worldwide to improve the state-of-the-art, and, in a sense, work as an extended R&D effort for Netflix to improve their movie recommendation accuracy.

How they did it: Joining forces. Only by an international collaboration, and the combining of methodologies, did the current leading team hit the mark. The team is composed of four teams that have also competed independently, located in the U.S., Canada, Austria and Israel.

Combined methodology made simple. Each team has developed an intricate approach. Once they agreed to collaborate, how hard did they have to work to integrate their systems? Actually, not hard at all. Rather than dig in, think hard, and assess where one system’s weaknesses may be compensated for by another team’s strengths, they let predictive modeling do it – at least, that’s how Mr. Töscher indicated they did it when 2 of these sub-teams combined to form “BellKor in BigChaos” and become the leader several months ago (we don’t yet officially know how they did it this time).

In this approach, each system may conveniently be treated as a “black box,” training a new “meta-system” to combine the respective outputs into one better output. This is called “meta-learning” or “ensemble methods”, which elicits the concept of collective intelligence.

So stay tuned – we should know more soon!

EricSiegel June 28, 2009
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