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Statistica Sinica 3(1993), 141-155


A PARADOX IN DECISION-THEORETIC

INTERVAL ESTIMATION


George Casella, J. T. Gene Hwang and Christian Robert


Cornell University and Université Paris VI


Abstract: Decision-theoretic interval estimation usually employs a loss function that is a linear combination of volume and coverage probability. Such loss functions, however, may result in paradoxical behavior of Bayes rules. We investigate this paradox in the case of Student's t, and suggest ways of avoiding it using a different loss function. Some properties of the resulting Bayes rules are also examined. This alternative approach may also be generalized.



Key words and phrases: Confidence sets, decision theory, Bayes estimation, foundations.



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