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“Multi-armed bandit” A/B testing optimality proved?

Correct me if I’m wrong, but it seems that this paper proves optimality of “multi-armed bandit” approach to A/B testing. The latter one was described in this post earlier this year. For those who do not understand what it is about: A/B testing requires investment in the form of sample size (usually it is equal […]

Measuring time spent on page

One of the challenges of A/B testing is insufficient observations due to low traffic. In other words, if you measured the conversion rate on our web site, it would take months or even years before we’d get conclusive result. What you can try to measure are microconversion and microobservations. That’s what I was up to […]