Decision-theoretic justifications for Bayesian hypothesis testing using credible sets

作者：Thulin Mans^*

来源：Journal of Statistical Planning and Inference, 2014, 146: 133-138.

DOI：10.1016/j.jspi.2013.09.014

• Bayesian inference
• Credible set
• Decision theory
• Directional conclusion
• Hypothesis testing
• Three-decision problem

In Bayesian statistics the precise point-null hypothesis theta=theta(0) can be tested by checking whether theta(0) is contained in a credible set. This permits testing of theta=theta(0) without having to put prior probabilities on the hypotheses. While such inversions of credible sets have a long history in Bayesian inference, they have been criticized for lacking decision-theoretic justification.
We argue that these tests have many advantages over the standard Bayesian tests that use point-mass probabilities on the null hypothesis. We present a decision-theoretic justification for the inversion of central credible intervals, and in special case HPD sets, by studying a three-decision problem with directional conclusions. Interpreting the loss function used in the justification, we discuss when tests based on credible sets are applicable.
We then give some justifications for using credible sets when testing composite hypotheses, showing that tests based on credible sets coincide with standard tests in this setting.

• 出版日期2014-3