Improving on two-stage estimators for scale families |
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Authors: | Tatsuya Kubokawa PhD |
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Affiliation: | (1) Institute of Mathematics, University of Tsukuba, 305 Tsukuba, Ibaraki, Japan |
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Abstract: | Summary Consider the problem of finding an estimator for a scale parameter such that its risk function is bounded by a preassigned constant. As a solution of the problem, two-stage estimators based on only the second sample have been proposed. The paper shows that these estimators can be improved by combining the first and the second sample. |
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