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Operationalizing Complex Causes: A Pragmatic View of Mediation
Limor Gultchin · David Watson · Matt J. Kusner · Ricardo Silva

Thu Jul 22 08:50 PM -- 08:55 PM (PDT) @ None

We examine the problem of causal response estimation for complex objects (e.g., text, images, genomics). In this setting, classical \emph{atomic} interventions are often not available (e.g., changes to characters, pixels, DNA base-pairs). Instead, we only have access to indirect or \emph{crude} interventions (e.g., enrolling in a writing program, modifying a scene, applying a gene therapy). In this work, we formalize this problem and provide an initial solution. Given a collection of candidate mediators, we propose (a) a two-step method for predicting the causal responses of crude interventions; and (b) a testing procedure to identify mediators of crude interventions. We demonstrate, on a range of simulated and real-world-inspired examples, that our approach allows us to efficiently estimate the effect of crude interventions with limited data from new treatment regimes.

Author Information

Limor Gultchin (University of Oxford)
David Watson (University College London)
Matt J. Kusner (University College London)
Ricardo Silva (University College London)

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