Edwin Chen

FEBRUARY 14, 2011

Introduction. In making its product recommendations, Amazon makes heavy use of an item-to-item collaborative filtering approach. This essentially means that for each item X, Amazon builds a neighborhood of related items S(X); whenever you buy/look at an item, Amazon then recommends you items from that item’s neighborhood. That’s why when you sign in to Amazon and look at the front page, your recommendations are mostly of the form “You viewed… Customers who viewed this als

Measurement 45

Measurement IT 45

Occam's Razor

FEBRUARY 22, 2011

Just when you thought you were finally getting more comfortable with website analytics and the metrics you report, here comes the massive explosion of mobile data! At one level it is the normal impressions and clicks data, but on another level we are getting new data and metrics we normally don't use. We are going to have fun doing cool stuff, learning new things.

Analytics 113

Analytics Advertising Metrics Measurement 113

Occam's Razor

FEBRUARY 7, 2011

After 416,350 words in posts and 845,128 words in comments on this blog, thus far, there is always more to explore, illuminate and share. Hence every once in a while I flip the tables and ask you for challenges you are facing. It is a great way to stay connected to what's most important to you (and keep the blog and its content relevant!). This past Monday I asked for your questions and you were kind enough to share some awesome questions.

Analytics 94

Analytics Measurement Metrics Predictive Analytics 94