A note on the coverage behaviour of bootstrap percentile confidence intervals for constrained parameters

Chunlin Wang (), Paul Marriott and Pengfei Li
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Chunlin Wang: Xiamen University
Paul Marriott: University of Waterloo
Pengfei Li: University of Waterloo

Metrika: International Journal for Theoretical and Applied Statistics, 2022, vol. 85, issue 7, No 2, 809-831

Abstract: Abstract The asymptotic behaviour of the commonly used bootstrap percentile confidence interval is investigated when the parameters are subject to linear inequality constraints. We concentrate on the important one- and two-sample problems with data generated from general distributions in the natural exponential family. The focus of this note is on quantifying the coverage probabilities of the parametric bootstrap percentile confidence intervals, in particular their limiting behaviour near boundaries. We propose using a local asymptotic framework to study this subtle coverage behaviour. Under this framework, we discover that when the true parameters are on, or close to, the restriction boundary, the asymptotic coverage probabilities can always exceed the nominal level in the one-sample case; however, they can be, remarkably, both under and over the nominal level in the two-sample case. Using illustrative examples, we show that the results provide theoretical justification and guidance on applying the bootstrap percentile method to constrained inference problems.

Keywords: Boundary constraint; Local asymptotics; Natural exponential family; Ordering constraint; Parametric bootstrap; Pivotal quantity (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1007/s00184-021-00851-0

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