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Three strings of inequalities among six Bayes estimators
Authors:Ying-Ying Zhang  Yu-Han Xie  Wen-He Song  Ming-Qin Zhou
Institution:Department of Statistics and Actuarial Science, College of Mathematics and Statistics, Chongqing University, Chongqing, China
Abstract:We discover three interesting strings of inequalities among six Bayes estimators, where for the parameter space (0, 1), (0, ∞), and ( ? ∞, ∞), each case has a string of inequalities. The three strings of inequalities only depend on the loss functions, and the inequalities are independent of the chosen models and the used priors provided the Bayes estimators exist. Therefore, they exist in a general setting which makes them quite interesting. Finally, the numerical simulations exemplify the two strings of inequalities defined on (0, 1) and (0, ∞), and that there does not exist a string of inequalities among the six smallest posterior expected losses.
Keywords:Bayes estimators  beta-binomial model  normal and inverse gamma model  posterior expected loss  strings of inequalities  
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