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Choice of Functional
•Parametric: Driven by efficiency of
functional for the particular parametric family
•Normal: use mean
•Lognormal: use (log) geometric
mean
•Double exponential: use median
•Uniform: use maximum
•Semiparametric: Choose functional for scientific
relevance, etc., then adopt a semiparametric model in which
desired functional is basic to model
•Survival data: consider hazard ratio
and use proportional hazards