Daniel Lemire's blog

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Most common questions about recommender systems…

3 thoughts on “Most common questions about recommender systems…”

  1. Daniel Haran says:

    My answer to #5 in commercial settings is “whichever makes you the most money”.

    Measuring profitability is no trivial task. Conversion rates, usage, churn and word of mouth can all be affected by the quality of the recommendations.

    There are hints in the literature about ways that recommenders can indirectly add revenue, see e.g. http://portal.acm.org/citation.cfm?id=1454054&dl=GUIDE&coll=GUIDE&CFID=77217953&CFTOKEN=60022310

  2. Excellent point, profitability is important.

  3. Marcel Blattner says:

    Nice post.

    Mixing methods is a good strategy, because the system is able ‘to learn’ (user feedback), which strategy fits best to customers (on a user level).

    However, it is important to ‘justify’ and to explain to users, why a particular item is recommended.