Sufficient covariates and linear propensity analysis
نویسندگان
چکیده
Working within the decision-theoretic framework for causal inference, we study the properties of “sufficient covariates”, which support causal inference from observational data, and possibilities for their reduction. In particular we illustrate the rôle of a propensity variable by means of a simple model, and explain why such a reduction typically does not increase (and may reduce) estimation efficiency.
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