MathDB4 problems
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Impossibility of universal sign preservation by experimental procedures
An experimental procedure is any procedure for comparing recommendation algorithms in an A/B experiment, and preserving the sign means preserving the sign of the comparison between…
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The conjectured mediated effect of promoted listings on conversion and GMV
Conjectured mediated-effect mechanism. The induced reduction in user engagement with organic search has negative effects on conversion rate and GMV, and those effects are partially…
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The conjectured attention-diversion mechanism of promoted listings
Conjectured attention-diversion mechanism. The improved promoted listings successfully match users' intentions and divert users' attention from organic search results on the same s…
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The conjectured causal mechanism of recommendation-module effects on sitewide metrics
Conjectured causal mechanism. The improved recommendation module successfully suggests listings that satisfy users' needs, so users need organic search less; the resulting negative…