Recent Posts

Blog posts and Summer gigs

Blog posts and Summer gigs

1 minute read

I have recently heard complaints that this blog is rather quiet lately. I agree. I have definitely been focused on publishing through other sources and have found little time to write interesting t...

Recommendations as Personalized Learning to Rank

Recommendations as Personalized Learning to Rank

6 minute read

As I have explained in other publications such as the Netflix Techblog, ranking is a very important part of a Recommender System. Although the Netflix Prize focused on rating prediction, ranking is...

Tools for Data Processing @ Webscale

Tools for Data Processing @ Webscale

3 minute read

A couple of days ago, I attended the Analytics @Webscale workshop at Facebook. I found this workshop to be very interesting from a technical perspective. This conference was mostly organized by Fac...

Recsys 2012: A long (and likely biased) summary

Recsys 2012: A long (and likely biased) summary

11 minute read

After a great week in beautiful and sunny Dublin (yes, sunny), it is time to look back and recap on the most interesting things that happened in the 2012 Recsys Conference. I have been attending th...

Netflix @ Recsys 2012

Netflix @ Recsys 2012

2 minute read

We are just a few days away from the 2012 ACM Recommender Systems Conference (#Recsys2012), that this year will take place in Dublin, Ireland. Over the years, Recsys has become my favorite conferen...

More data or better models?

More data or better models?

6 minute read

The discussion of whether it is better to focus on building better algorithms or getting more data is by no means new. But, it is really catching on lately. This was one of the preferred discussion...

Beyond the 5 Stars Round up

Beyond the 5 Stars Round up

2 minute read

Last week, I published a post on the Netflix tech blog. The post, entitled “Netflix Recommendations: Beyond the 5 stars” describes how recommendations have evolved at Netflix since the Netflix Priz...

Recsys 2011 – Notes and Pointers

Recsys 2011 – Notes and Pointers

5 minute read

I found Recsys this year of very high quality in general. There were many good papers and presentations. The Industry track was also very high-quality, with very interesting talks from companies s...

The Recommender Problem & the Presentation Context

The Recommender Problem & the Presentation Context

4 minute read

In the traditional formulation of the “Recommender Problem”, we have pairs of items and users and user feedback values for very few of those dyads. The problem is formulated as the finding of a uti...