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Author

Takes Fujita

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#artificial intelligence Preprint Sep 2026

Information Set Emulation: Causal Certificates for AI Derived EHR Features

AI and large language models can recover clinically meaningful features from electronic health records (EHRs), but predictive usefulness does not establish admissibility for causal inference. We introduce information set emulation: an AI typed lift attaches source evidence, clinical and recording times, decision-time a...

Takes Fujita, N. Hattori · 0 citations
#artificial intelligence Preprint Sep 2026

When AI Generates Covariates: Causal Typing and Estimand Drift in Sequential Experiments

AI-generated covariates from notes, conversations, images, and wearable streams can change the causal question when their roles are left unspecified. A generated feature may represent a treatment version, pre-action state, history, design variable, mediator, outcome proxy, observation process, or intercurrent event; th...

Takes Fujita, N. Hattori · 0 citations

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