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Feedback Detection for Live Predictors
Stefan Wager · Nick Chamandy · Omkar Muralidharan · Amir Najmi

Tue Dec 04:00 PM -- 08:59 PM PST @ Level 2, room 210D #None

A predictor that is deployed in a live production system may perturb the features it uses to make predictions. Such a feedback loop can occur, for example, when a model that predicts a certain type of behavior ends up causing the behavior it predicts, thus creating a self-fulfilling prophecy. In this paper we analyze predictor feedback detection as a causal inference problem, and introduce a local randomization scheme that can be used to detect non-linear feedback in real-world problems. We conduct a pilot study for our proposed methodology using a predictive system currently deployed as a part of a search engine.

Author Information

Stefan Wager (Stanford University)
Nick Chamandy (Google)
Omkar Muralidharan (Google)
Amir Najmi (Google)

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