I did "second order" recommendations before but more to fight sparsity and
find more significant associations in situations with less traffic, so
recommending categories instead of products. There needs to be some third
order sorting / boosting like you mentioned with "new music", or maybe
popularity or hotness to avoid quasi-random order. For events with limited
lifetime it's probably some mixture of spatial distance and freshness.

We will definetely keep an eye on the generation process of data for new
items. It depends on the domain but in the time of multi channel promotion
of videos, shows and products, it's also helps that there is traffic driven
from external sources.

Thanks for the detailed  hints - now it's time to see what comes out of


On Sun, Nov 12, 2017 at 7:52 AM, Ted Dunning <[EMAIL PROTECTED]> wrote: