rival
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Group evaluation?
None of the recommendation frameworks have group recommendation out of the box (AFAIK), this does not mean we shouldn't do group evaluation..
Comments @abellogin?
Considering that there are not too many datasets, it could be difficult to start from scratch.
I would base the format and metrics on this http://2011.camrachallenge.com/evaluation/ Did you have anything else in mind?
I think that would be a good start. The main idea would be to provide an example of how to do this (i.e. according to the link) and allowing other type of group evaluation strategies to be implemented should anyone want to do so.