What is it about?
We establish how the asymptotic expansions for the coverage probability of confidence set centered at the James-Stein can be used for a construction of confidence region with constant confidence level, which is asymptotically equal to some fixed value $1-\alpha$.
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Why is it important?
A confidence region $D$ with confidence level, which is asymptotically ($\tau\to 0$ or $\tau \to \infty$) equal to fixed value, may be much smaller by size than used confidence set $D_{\delta^+}$. A point $\tau$ is detected, starting from which a quick decreasing of coverage probability of true parametric values by the region $D$ appears. This provides us an interval of values of $\tau$ when it is preferable to use of the confidence region $D$, than the usual confidence set $D_{\delta^+}$.
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This page is a summary of: Confidence sets based on the positive part James–Stein estimator with the asymptotically constant coverage probability, Journal of Statistical Computation and Simulation, July 2014, Taylor & Francis,
DOI: 10.1080/00949655.2014.933223.
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