© 1988 by Biometrika Trust
On conditioning for model-based inference in survey sampling
Department of Social Statistics, University of Southampton Southampton SO9 5NH, U.K.
A discontinuity of sampling distribution inference between a prediction problem and an estimation problem in model-based survey sampling is discussed. The problem is resolved by conditioning on an appropriate ancillary within a curved exponential family framework. The ignorability of the sampling design for inference is discussed.
Key Words: Conditional additive exponential family Conditional inference Curved exponential family Finite population Ignorability Observational study Sampling design